From ebb527d34733e21e9c220597ab3833d2f6872166 Mon Sep 17 00:00:00 2001
From: Ryan Nowak <nowakra@gmail.com>
Date: Tue, 19 Feb 2019 18:10:17 -0800
Subject: [PATCH 1/3] [wip] Update Razor SDK and resolve issues

I'm still chasing one more issue.

(cherry picked from commit 616a4a36f575d16f911db7bdcbec38841497ffb8)
---
 eng/Version.Details.xml                       |  18 +-
 eng/Versions.props                            |  10 +-
 .../Build/test/BindRazorIntegrationTest.cs    |  28 +-
 .../test/RenderingRazorIntegrationTest.cs     |  79 ++-
 .../Components/src/EventCallbackFactory.cs    |  71 +--
 .../Components/src/RuntimeHelpers.cs          | 503 +++++++++++++++++-
 .../test/EventCallbackFactoryTest.cs          | 150 +++++-
 ...scadingValueReceiveFixedByInterface.cshtml |   2 +
 .../EventCallbackCases.cshtml                 |  12 +-
 .../SimpleValidationComponent.cshtml          |   2 +-
 .../TypicalValidationComponent.cshtml         |  20 +-
 11 files changed, 760 insertions(+), 135 deletions(-)

diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index c72f509ca1..0c58a8e17a 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
 
   This file is used by automation to update Versions.props and may be used for other purposes, such as
@@ -9,21 +9,21 @@
 -->
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.AspNetCore.Razor.Language" Version="3.0.0-preview-19107-04">
+    <Dependency Name="Microsoft.AspNetCore.Razor.Language" Version="3.0.0-preview3.19119.5">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
-      <Sha>408b123a6454841884c1d840fb853eec8de12c10</Sha>
+      <Sha>182b2c81a5a3c2d5219cf20205e49dbe86823e18</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.AspNetCore.Mvc.Razor.Extensions" Version="3.0.0-preview-19107-04">
+    <Dependency Name="Microsoft.AspNetCore.Mvc.Razor.Extensions" Version="3.0.0-preview3.19119.5">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
-      <Sha>408b123a6454841884c1d840fb853eec8de12c10</Sha>
+      <Sha>182b2c81a5a3c2d5219cf20205e49dbe86823e18</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Razor" Version="3.0.0-preview-19107-04">
+    <Dependency Name="Microsoft.CodeAnalysis.Razor" Version="3.0.0-preview3.19119.5">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
-      <Sha>408b123a6454841884c1d840fb853eec8de12c10</Sha>
+      <Sha>182b2c81a5a3c2d5219cf20205e49dbe86823e18</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NET.Sdk.Razor" Version="3.0.0-preview-19107-04">
+    <Dependency Name="Microsoft.NET.Sdk.Razor" Version="3.0.0-preview3.19119.5">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
-      <Sha>408b123a6454841884c1d840fb853eec8de12c10</Sha>
+      <Sha>182b2c81a5a3c2d5219cf20205e49dbe86823e18</Sha>
     </Dependency>
     <Dependency Name="dotnet-ef" Version="3.0.0-preview.19080.1">
       <Uri>https://github.com/aspnet/EntityFrameworkCore</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index a84ba66432..322ea925c9 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -1,4 +1,4 @@
-
+
 <!--
 
   This file defines the versions of external dependencies used by ASP.NET Core.
@@ -112,10 +112,10 @@
     <MicrosoftEntityFrameworkCoreToolsPackageVersion>3.0.0-preview.19080.1</MicrosoftEntityFrameworkCoreToolsPackageVersion>
     <MicrosoftEntityFrameworkCorePackageVersion>3.0.0-preview.19080.1</MicrosoftEntityFrameworkCorePackageVersion>
     <!-- Packages from aspnet/AspNetCore-Tooling -->
-    <MicrosoftAspNetCoreMvcRazorExtensionsPackageVersion>3.0.0-preview-19107-04</MicrosoftAspNetCoreMvcRazorExtensionsPackageVersion>
-    <MicrosoftAspNetCoreRazorLanguagePackageVersion>3.0.0-preview-19107-04</MicrosoftAspNetCoreRazorLanguagePackageVersion>
-    <MicrosoftCodeAnalysisRazorPackageVersion>3.0.0-preview-19107-04</MicrosoftCodeAnalysisRazorPackageVersion>
-    <MicrosoftNETSdkRazorPackageVersion>3.0.0-preview-19107-04</MicrosoftNETSdkRazorPackageVersion>
+    <MicrosoftAspNetCoreMvcRazorExtensionsPackageVersion>3.0.0-preview3.19119.5</MicrosoftAspNetCoreMvcRazorExtensionsPackageVersion>
+    <MicrosoftAspNetCoreRazorLanguagePackageVersion>3.0.0-preview3.19119.5</MicrosoftAspNetCoreRazorLanguagePackageVersion>
+    <MicrosoftCodeAnalysisRazorPackageVersion>3.0.0-preview3.19119.5</MicrosoftCodeAnalysisRazorPackageVersion>
+    <MicrosoftNETSdkRazorPackageVersion>3.0.0-preview3.19119.5</MicrosoftNETSdkRazorPackageVersion>
   </PropertyGroup>
   <!--
 
diff --git a/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
index 7e001e6c30..1ef3c5df59 100644
--- a/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/BindRazorIntegrationTest.cs
@@ -91,7 +91,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Component(frame, "Test.MyComponent", 3, 0),
                 frame => AssertFrame.Attribute(frame, "Value", 42, 1),
-                frame => AssertFrame.Attribute(frame, "ValueChanged", typeof(Action<UIEventArgs>), 2));
+                frame => AssertFrame.Attribute(frame, "ValueChanged", typeof(EventCallback<UIChangeEventArgs>), 2));
         }
 
         [Fact]
@@ -167,7 +167,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Component(frame, "Test.MyComponent", 3, 0),
                 frame => AssertFrame.Attribute(frame, "Value", 42, 1),
-                frame => AssertFrame.Attribute(frame, "OnChanged", typeof(Action<UIEventArgs>), 2));
+                frame => AssertFrame.Attribute(frame, "OnChanged", typeof(EventCallback<UIChangeEventArgs>), 2));
         }
 
         [Fact]
@@ -201,7 +201,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Element(frame, "div", 3, 0),
                 frame => AssertFrame.Attribute(frame, "myvalue", "hi", 1),
-                frame => AssertFrame.Attribute(frame, "myevent", typeof(Action<UIEventArgs>), 2));
+                frame => AssertFrame.Attribute(frame, "myevent", typeof(EventCallback), 2));
         }
 
         [Fact]
@@ -235,7 +235,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Element(frame, "div", 3, 0),
                 frame => AssertFrame.Attribute(frame, "myvalue", "hi", 1),
-                frame => AssertFrame.Attribute(frame, "myevent", typeof(Action<UIEventArgs>), 2));
+                frame => AssertFrame.Attribute(frame, "myevent", typeof(EventCallback), 2));
         }
 
         [Fact]
@@ -292,7 +292,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
                 frame => AssertFrame.Attribute(frame, "value", "42", 1),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 2));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 2));
         }
 
         [Fact]
@@ -315,7 +315,7 @@ namespace Test
                 frame => AssertFrame.Element(frame, "input", 4, 0),
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "value", new DateTime(2018, 1, 1).ToString("MM/dd/yyyy"), 2),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact]
@@ -340,7 +340,7 @@ namespace Test
                 frame => AssertFrame.Element(frame, "input", 4, 0),
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "value", new DateTime(2018, 1, 1).ToString("MM/dd/yyyy"), 2),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact]
@@ -363,7 +363,7 @@ namespace Test
                 frame => AssertFrame.Element(frame, "input", 4, 0),
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "value", "42", 2),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact]
@@ -385,7 +385,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
                 frame => AssertFrame.Attribute(frame, "type", "checkbox", 1),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact]
@@ -408,7 +408,7 @@ namespace Test
                 frame => AssertFrame.Element(frame, "input", 4, 0),
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "value", "42", 2),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact]
@@ -431,7 +431,7 @@ namespace Test
                 frame => AssertFrame.Element(frame, "input", 4, 0),
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "value", new DateTime(2018, 1, 1).ToString("MM/dd"), 2),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 3));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 3));
         }
 
         [Fact] // Additional coverage of OrphanTagHelperLoweringPass
@@ -455,7 +455,7 @@ namespace Test
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "visible", 2),
                 frame => AssertFrame.Attribute(frame, "value", "42", 3),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 4));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 4));
         }
 
         [Fact] // See https://github.com/aspnet/Blazor/issues/703
@@ -482,7 +482,7 @@ namespace Test
                 frame => AssertFrame.Attribute(frame, "type", "text", 1),
                 frame => AssertFrame.Attribute(frame, "visible", 2),
                 frame => AssertFrame.Attribute(frame, "value", "42", 3),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 4));
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 4));
         }
 
         [Fact] // Additional coverage of OrphanTagHelperLoweringPass
@@ -506,7 +506,7 @@ namespace Test
                 frames,
                 frame => AssertFrame.Element(frame, "div", 7, 0),
                 frame => AssertFrame.Attribute(frame, "value", "42", 1),
-                frame => AssertFrame.Attribute(frame, "onchange", typeof(Action<UIEventArgs>), 2),
+                frame => AssertFrame.Attribute(frame, "onchange", typeof(EventCallback), 2),
                 frame => AssertFrame.Whitespace(frame, 3),
                 frame => AssertFrame.Element(frame, "span", 2, 4),
                 frame => AssertFrame.Text(frame, "42", 5),
diff --git a/src/Components/Blazor/Build/test/RenderingRazorIntegrationTest.cs b/src/Components/Blazor/Build/test/RenderingRazorIntegrationTest.cs
index 7f48119dc1..fd01ea7eb0 100644
--- a/src/Components/Blazor/Build/test/RenderingRazorIntegrationTest.cs
+++ b/src/Components/Blazor/Build/test/RenderingRazorIntegrationTest.cs
@@ -365,7 +365,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
@@ -373,11 +373,16 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
-            await renderer.Invoke(() => setter(new UIChangeEventArgs { Value = "Modified value", }));
+            //
+            // This should always complete synchronously.
+            var task = renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs { Value = "Modified value", }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.Equal("Modified value", myValueProperty.GetValue(component));
         }
 
@@ -395,7 +400,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "textarea", 3, 0),
@@ -403,11 +408,16 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
-            await renderer.Invoke(() => setter(new UIChangeEventArgs() { Value = "Modified value", }));
+            //
+            // This should always complete synchronously.
+            var task = renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs { Value = "Modified value", }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.Equal("Modified value", myValueProperty.GetValue(component));
         }
 
@@ -425,7 +435,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
@@ -433,12 +443,18 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
+            // Trigger the change event to show it updates the property
+            //
+            // This should always complete synchronously.
             var newDateValue = new DateTime(2018, 3, 5, 4, 5, 6);
-            await renderer.Invoke(() => setter(new UIChangeEventArgs() { Value = newDateValue.ToString(), }));
+            var task = renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs { Value = newDateValue.ToString(), }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.Equal(newDateValue, myDateProperty.GetValue(component));
         }
 
@@ -457,7 +473,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
@@ -465,11 +481,16 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
-            await renderer.Invoke(() => setter(new UIChangeEventArgs() { Value = new DateTime(2018, 3, 5).ToString(testDateFormat), }));
+            //
+            // This should always complete synchronously.
+            var task = renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs { Value = new DateTime(2018, 3, 5).ToString(testDateFormat), }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.Equal(new DateTime(2018, 3, 5), myDateProperty.GetValue(component));
         }
 
@@ -540,18 +561,22 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var frames = GetRenderTree(renderer, component);
 
             // Assert
-            Assert.Collection(frames,
+            Action<UIMouseEventArgs> func = default; // Since this is a method group, we don't need to create an EventCallback
+            Assert.Collection(
+                frames,
                 frame => AssertFrame.Element(frame, "button", 2, 0),
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onclick", 1);
 
-                    var func = Assert.IsType<Action<UIMouseEventArgs>>(frame.AttributeValue);
+                    func = Assert.IsType<Action<UIMouseEventArgs>>(frame.AttributeValue);
                     Assert.False((bool)clicked.GetValue(component));
 
-                    func(new UIMouseEventArgs());
-                    Assert.True((bool)clicked.GetValue(component));
+
                 });
+
+            func.Invoke(new UIMouseEventArgs());
+            Assert.True((bool)clicked.GetValue(component));
         }
 
         [Fact]
@@ -568,7 +593,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
@@ -576,11 +601,16 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
-            await renderer.Invoke(() => setter(new UIChangeEventArgs() { Value = false, }));
+            //
+            // This should always complete synchronously.
+            var task =  renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs() { Value = false, }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.False((bool)myValueProperty.GetValue(component));
         }
 
@@ -599,7 +629,7 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
             var renderer = new TestRenderer();
 
             // Assert
-            Action<UIEventArgs> setter = null;
+            EventCallback setter = default;
             var frames = GetRenderTree(renderer, component);
             Assert.Collection(frames,
                 frame => AssertFrame.Element(frame, "input", 3, 0),
@@ -607,11 +637,16 @@ namespace Microsoft.AspNetCore.Blazor.Build.Test
                 frame =>
                 {
                     AssertFrame.Attribute(frame, "onchange", 2);
-                    setter = Assert.IsType<Action<UIEventArgs>>(frame.AttributeValue);
+                    setter = Assert.IsType<EventCallback>(frame.AttributeValue);
                 });
 
             // Trigger the change event to show it updates the property
-            await renderer.Invoke(() => setter(new UIChangeEventArgs() { Value = MyEnum.SecondValue.ToString(), }));
+            //
+            // This should always complete synchronously.
+            var task = renderer.InvokeAsync(() => setter.InvokeAsync(new UIChangeEventArgs { Value = MyEnum.SecondValue.ToString(), }));
+            Assert.Equal(TaskStatus.RanToCompletion, task.Status);
+            await task;
+
             Assert.Equal(MyEnum.SecondValue, (MyEnum)myValueProperty.GetValue(component));
         }
 
diff --git a/src/Components/Components/src/EventCallbackFactory.cs b/src/Components/Components/src/EventCallbackFactory.cs
index c87d500a00..a93b897ab5 100644
--- a/src/Components/Components/src/EventCallbackFactory.cs
+++ b/src/Components/Components/src/EventCallbackFactory.cs
@@ -44,11 +44,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore(receiver, callback);
         }
 
@@ -66,11 +61,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore(receiver, callback);
         }
 
@@ -88,11 +78,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore(receiver, callback);
         }
 
@@ -110,11 +95,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore(receiver, callback);
         }
 
@@ -135,6 +115,23 @@ namespace Microsoft.AspNetCore.Components
             return callback;
         }
 
+        /// <summary>
+        /// Returns the provided <paramref name="callback"/>. For internal framework use only.
+        /// </summary>
+        /// <param name="receiver"></param>
+        /// <param name="callback"></param>
+        /// <returns></returns>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public EventCallback<T> Create<T>(object receiver, EventCallback callback)
+        {
+            if (receiver == null)
+            {
+                throw new ArgumentNullException(nameof(receiver));
+            }
+
+            return new EventCallback<T>(callback.Receiver, callback.Delegate);
+        }
+
         /// <summary>
         /// Returns the provided <paramref name="callback"/>. For internal framework use only.
         /// </summary>
@@ -166,11 +163,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore<T>(receiver, callback);
         }
 
@@ -188,11 +180,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore<T>(receiver, callback);
         }
 
@@ -210,11 +197,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore<T>(receiver, callback);
         }
 
@@ -232,11 +214,6 @@ namespace Microsoft.AspNetCore.Components
                 throw new ArgumentNullException(nameof(receiver));
             }
 
-            if (callback == null)
-            {
-                throw new ArgumentNullException(nameof(callback));
-            }
-
             return CreateCore<T>(receiver, callback);
         }
 
@@ -270,22 +247,12 @@ namespace Microsoft.AspNetCore.Components
 
         private EventCallback CreateCore(object receiver, MulticastDelegate callback)
         {
-            if (!object.ReferenceEquals(receiver, callback.Target) && receiver is IHandleEvent handler)
-            {
-                return new EventCallback(handler, callback);
-            }
-
-            return new EventCallback(callback.Target as IHandleEvent, callback);
+            return new EventCallback(callback?.Target as IHandleEvent ?? receiver as IHandleEvent, callback);
         }
 
         private EventCallback<T> CreateCore<T>(object receiver, MulticastDelegate callback)
         {
-            if (!object.ReferenceEquals(receiver, callback.Target) && receiver is IHandleEvent handler)
-            {
-                return new EventCallback<T>(handler, callback);
-            }
-
-            return new EventCallback<T>(callback.Target as IHandleEvent, callback);
+            return new EventCallback<T>(callback?.Target as IHandleEvent ?? receiver as IHandleEvent, callback);
         }
     }
 }
diff --git a/src/Components/Components/src/RuntimeHelpers.cs b/src/Components/Components/src/RuntimeHelpers.cs
index 3ef9517c19..bd7ae2dcc5 100644
--- a/src/Components/Components/src/RuntimeHelpers.cs
+++ b/src/Components/Components/src/RuntimeHelpers.cs
@@ -2,10 +2,14 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Components.Forms;
+
 namespace Microsoft.AspNetCore.Components
 {
     /// <summary>
-    /// Used by generated code produced by the Blazor code generator. Not intended or supported
+    /// Used by generated code produced by the Components code generator. Not intended or supported
     /// for use in application code.
     /// </summary>
     public static class RuntimeHelpers
@@ -17,5 +21,502 @@ namespace Microsoft.AspNetCore.Components
         /// <param name="value"></param>
         /// <returns></returns>
         public static T TypeCheck<T>(T value) => value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<EditContext> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<EditContext, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIChangeEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIChangeEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIClipboardEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIClipboardEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIDataTransferItem> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIDataTransferItem, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIDragEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIDragEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIErrorEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIErrorEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIFocusEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIFocusEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIKeyboardEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIKeyboardEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIMouseEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIMouseEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIPointerEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIPointerEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIProgressEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIProgressEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UITouchEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UITouchEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<UIWheelEventArgs> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<UIWheelEventArgs, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<int> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<int, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<int?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<int?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<long> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<long, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<long?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<long?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<decimal> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<decimal, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<decimal?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<decimal?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<float> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<float, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<float?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<float?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<double> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<double, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<double?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<double?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<DateTime> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<DateTime, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<DateTime?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<DateTime?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<bool> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<bool, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<bool?> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<bool?, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<string> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<string, Task> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Action<object> value) => (T)(object)value;
+
+        /// <summary>
+        /// Not intended for use by application code.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T TypeCheck<T>(Func<object, Task> value) => (T)(object)value;
+
     }
 }
diff --git a/src/Components/Components/test/EventCallbackFactoryTest.cs b/src/Components/Components/test/EventCallbackFactoryTest.cs
index 15b410a30f..e88e74badd 100644
--- a/src/Components/Components/test/EventCallbackFactoryTest.cs
+++ b/src/Components/Components/test/EventCallbackFactoryTest.cs
@@ -58,8 +58,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -80,6 +80,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void Create_Action_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create(component, (Action)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void Create_ActionT_AlreadyBoundToReceiver()
         {
@@ -110,8 +125,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -132,6 +147,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void Create_ActionT_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create(component, (Action<string>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void Create_FuncTask_AlreadyBoundToReceiver()
         {
@@ -162,8 +192,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -200,6 +230,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.False(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void Create_FuncTask_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create(component, (Func<Task>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void Create_FuncTTask_DifferentReceiver()
         {
@@ -214,8 +259,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -236,6 +281,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void Create_FuncTTask_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create(component, (Func<string, Task>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void CreateT_String_ReturnsInput()
         {
@@ -299,8 +359,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -321,6 +381,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void CreateT_Action_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create<string>(component, (Action)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void CreateT_ActionT_AlreadyBoundToReceiver()
         {
@@ -351,7 +426,22 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
+        }
+
+        [Fact]
+        public void CreateT_ActionT_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create<string>(component, (Action<string>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
@@ -403,8 +493,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -425,6 +515,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void CreateT_FuncTask_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create<string>(component, (Func<Task>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void CreateT_FuncTTask_AlreadyBoundToReceiver()
         {
@@ -455,8 +560,8 @@ namespace Microsoft.AspNetCore.Components
 
             // Assert
             Assert.Same(@delegate, callback.Delegate);
-            Assert.Same(anotherComponent, callback.Receiver);
-            Assert.True(callback.RequiresExplicitReceiver);
+            Assert.Same(component, callback.Receiver);
+            Assert.False(callback.RequiresExplicitReceiver);
         }
 
         [Fact]
@@ -477,6 +582,21 @@ namespace Microsoft.AspNetCore.Components
             Assert.True(callback.RequiresExplicitReceiver);
         }
 
+        [Fact]
+        public void CreateT_FuncTTask_Null()
+        {
+            // Arrange
+            var component = new EventComponent();
+
+            // Act
+            var callback = EventCallback.Factory.Create<string>(component, (Func<string, Task>)null);
+
+            // Assert
+            Assert.Null(callback.Delegate);
+            Assert.Same(component, callback.Receiver);
+            Assert.True(callback.RequiresExplicitReceiver);
+        }
+
         [Fact]
         public void CreateInferred_ActionT()
         {
diff --git a/src/Components/test/testassets/BasicTestApp/CascadingValueTest/CascadingValueReceiveFixedByInterface.cshtml b/src/Components/test/testassets/BasicTestApp/CascadingValueTest/CascadingValueReceiveFixedByInterface.cshtml
index 3878c21e66..cf6b9abc90 100644
--- a/src/Components/test/testassets/BasicTestApp/CascadingValueTest/CascadingValueReceiveFixedByInterface.cshtml
+++ b/src/Components/test/testassets/BasicTestApp/CascadingValueTest/CascadingValueReceiveFixedByInterface.cshtml
@@ -11,6 +11,8 @@
 <p>
     @(nameof(CascadingValueReceiveFixedByInterface)) render count:
     <strong id="receive-by-interface-num-renders">@numRenders</strong>
+
+    @* Prevent rerendering this component when the button is clicked. *@
     <button id="decrement-count" onclick=@Ancestor.DecrementCount>Decrement</button>
 </p>
 
diff --git a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/EventCallbackCases.cshtml b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/EventCallbackCases.cshtml
index 2324f8d0d8..945e89a290 100644
--- a/src/Components/test/testassets/BasicTestApp/EventCallbackTest/EventCallbackCases.cshtml
+++ b/src/Components/test/testassets/BasicTestApp/EventCallbackTest/EventCallbackCases.cshtml
@@ -10,29 +10,29 @@
 </div>
 <div id="capturing_lambda">
     <h3>Passing Capturing Lambda to Button</h3>
-    <InnerButton OnClick="@EventCallback.Factory.Create(this, () => { GC.KeepAlive(this); })" Text="Capturing Lambda" />
+    <InnerButton OnClick="@(() => { GC.KeepAlive(this); })" Text="Capturing Lambda" />
 </div>
 <div id="unbound_lambda">
     <h3>Passing Unbound Lambda to Button</h3>
-    <InnerButton OnClick="@EventCallback.Factory.Create(this, () => { })" Text="Unbound Lambda" />
+    <InnerButton OnClick="@(() => { })" Text="Unbound Lambda" />
 </div>
 <div id="unbound_lambda_nested">
     <h3>Passing Unbound Lambda to Nested Button</h3>
-    <MiddleButton OnClick="@EventCallback.Factory.Create(this, () => { })" Text="Unbound Lambda Nested" />
+    <MiddleButton OnClick="@(() => { })" Text="Unbound Lambda Nested" />
 </div>
 <div id="unbound_lambda_strongly_typed">
     <h3>Passing Capturing Lambda to Strongly Typed Button</h3>
-    <StronglyTypedButton OnClick="@(EventCallback.Factory.Create<UIMouseEventArgs>(this, () => { GC.KeepAlive(this); }))" Text="Unbound Lambda Strongly-Typed" />
+    <StronglyTypedButton OnClick="@(() => { GC.KeepAlive(this); })" Text="Unbound Lambda Strongly-Typed" />
 </div>
 <div id="unbound_lambda_child_content">
     <h3>Passing Child Content</h3>
     <TemplatedControl>
-        <button onclick="@EventCallback.Factory.Create(this, () => { })">Unbound Lambda Child Content</button>
+        <button onclick="@(() => { })">Unbound Lambda Child Content</button>
     </TemplatedControl>
 </div>
 <div id="unbound_lambda_bind_to_component">
     <h3>Passing Child Content</h3>
-    <ButtonComponent Count="@buttonComponentCount" CountChanged="@(EventCallback.Factory.Create<int>(this, () => { }))" Text="Unbound Lambda Bind-To-Component" />
+    <ButtonComponent bind-Count="buttonComponentCount" Text="Unbound Lambda Bind-To-Component" />
 </div>
 
 @functions {
diff --git a/src/Components/test/testassets/BasicTestApp/FormsTest/SimpleValidationComponent.cshtml b/src/Components/test/testassets/BasicTestApp/FormsTest/SimpleValidationComponent.cshtml
index faca63ad32..bc9a267403 100644
--- a/src/Components/test/testassets/BasicTestApp/FormsTest/SimpleValidationComponent.cshtml
+++ b/src/Components/test/testassets/BasicTestApp/FormsTest/SimpleValidationComponent.cshtml
@@ -1,7 +1,7 @@
 @using System.ComponentModel.DataAnnotations
 @using Microsoft.AspNetCore.Components.Forms
 
-<EditForm Model="@this" OnValidSubmit="@(EventCallback.Factory.Create<EditContext>(this, HandleValidSubmit))" OnInvalidSubmit="@(EventCallback.Factory.Create<EditContext>(this, HandleInvalidSubmit))">
+<EditForm Model="@this" OnValidSubmit="@HandleValidSubmit" OnInvalidSubmit="@HandleInvalidSubmit">
     <DataAnnotationsValidator />
 
     <p class="user-name">
diff --git a/src/Components/test/testassets/BasicTestApp/FormsTest/TypicalValidationComponent.cshtml b/src/Components/test/testassets/BasicTestApp/FormsTest/TypicalValidationComponent.cshtml
index 4ee4472b6e..6941594fc1 100644
--- a/src/Components/test/testassets/BasicTestApp/FormsTest/TypicalValidationComponent.cshtml
+++ b/src/Components/test/testassets/BasicTestApp/FormsTest/TypicalValidationComponent.cshtml
@@ -1,34 +1,34 @@
 @using System.ComponentModel.DataAnnotations
 @using Microsoft.AspNetCore.Components.Forms
 
-<EditForm Model="@person" OnValidSubmit="@(EventCallback.Factory.Create<EditContext>(this, HandleValidSubmit))">
+<EditForm Model="@person" OnValidSubmit="@HandleValidSubmit">
     <DataAnnotationsValidator />
 
     <p class="name">
-        Name: <InputText bind-Value="@person.Name" ValueExpression="@(() => person.Name)" />
+        Name: <InputText bind-Value="@person.Name" />
     </p>
     <p class="email">
-        Email: <InputText bind-Value="@person.Email" ValueExpression="@(() => person.Email)" />
+        Email: <InputText bind-Value="@person.Email" />
         <ValidationMessage For="@(() => person.Email)" />
     </p>
     <p class="age">
-        Age (years): <InputNumber bind-Value="@person.AgeInYears" ValueExpression="@(() => person.AgeInYears)" />
+        Age (years): <InputNumber bind-Value="@person.AgeInYears" />
     </p>
     <p class="height">
-        Height (optional): <InputNumber bind-Value="@person.OptionalHeight" ValueExpression="@(() => person.OptionalHeight)" />
+        Height (optional): <InputNumber bind-Value="@person.OptionalHeight" />
     </p>
     <p class="description">
-        Description: <InputTextArea bind-Value="@person.Description" ValueExpression="@(() => person.Description)" />
+        Description: <InputTextArea bind-Value="@person.Description" />
     </p>
     <p class="renewal-date">
-        Renewal date: <InputDate bind-Value="@person.RenewalDate" ValueExpression="@(() => person.RenewalDate)" />
+        Renewal date: <InputDate bind-Value="@person.RenewalDate" />
     </p>
     <p class="expiry-date">
-        Expiry date (optional): <InputDate bind-Value="@person.OptionalExpiryDate" ValueExpression="@(() => person.OptionalExpiryDate)" />
+        Expiry date (optional): <InputDate bind-Value="@person.OptionalExpiryDate" />
     </p>
     <p class="ticket-class">
         Ticket class:
-        <InputSelect bind-Value="@person.TicketClass" ValueExpression="@(() => person.TicketClass)">
+        <InputSelect bind-Value="@person.TicketClass">
             <option>(select)</option>
             <option value="@TicketClass.Economy">Economy class</option>
             <option value="@TicketClass.Premium">Premium class</option>
@@ -36,7 +36,7 @@
         </InputSelect>
     </p>
     <p class="accepts-terms">
-        Accepts terms: <InputCheckbox bind-Value="@person.AcceptsTerms" ValueExpression="@(() => person.AcceptsTerms)" />
+        Accepts terms: <InputCheckbox bind-Value="@person.AcceptsTerms" />
     </p>
 
     <button type="submit">Submit</button>

From 4c0b114b1281d6eec9168e2947b63fcca7b5641f Mon Sep 17 00:00:00 2001
From: John Luo <johluo@microsoft.com>
Date: Thu, 21 Feb 2019 15:12:13 -0800
Subject: [PATCH 2/3] Add gRPC templates (#7561)

---
 eng/Versions.props                            |   5 +-
 eng/scripts/CodeCheck.ps1                     |   4 +-
 .../GrpcService-CSharp.Client.csproj.in       |  21 ++++
 .../GrpcService-CSharp.Server.csproj.in       |  19 ++++
 ...crosoft.DotNet.Web.ProjectTemplates.csproj |   6 ++
 .../.template.config/dotnetcli.host.json      |  16 +++
 .../.template.config/template.json            | 102 ++++++++++++++++++
 .../.template.config/vs-2017.3.host.json      |  19 ++++
 .../.template.config/vs-2017.3/Empty.png      | Bin 0 -> 303 bytes
 .../GrpcService-CSharp.Client/Program.cs      |  30 ++++++
 .../GrpcService-CSharp.Server/Program.cs      |  25 +++++
 .../Properties/launchSettings.json            |  12 +++
 .../Services/GreeterService.cs                |  20 ++++
 .../GrpcService-CSharp.Server/Startup.cs      |  35 ++++++
 .../appsettings.Development.json              |   9 ++
 .../appsettings.json                          |  14 +++
 .../GrpcService-CSharp/GrpcService-CSharp.sln |  50 +++++++++
 .../GrpcService-CSharp/Protos/greet.proto     |  19 ++++
 18 files changed, 403 insertions(+), 3 deletions(-)
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Client.csproj.in
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Server.csproj.in
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/dotnetcli.host.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/template.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3.host.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3/Empty.png
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Client/Program.cs
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Program.cs
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Properties/launchSettings.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Services/GreeterService.cs
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Startup.cs
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.Development.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.json
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.sln
 create mode 100644 src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/Protos/greet.proto

diff --git a/eng/Versions.props b/eng/Versions.props
index 322ea925c9..ac9bc81423 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -172,10 +172,13 @@
     <BenchmarkDotNetPackageVersion>0.10.13</BenchmarkDotNetPackageVersion>
     <CastleCorePackageVersion>4.2.1</CastleCorePackageVersion>
     <FSharpCorePackageVersion>4.2.1</FSharpCorePackageVersion>
+    <GoogleProtobufPackageVersion>3.6.1</GoogleProtobufPackageVersion>
+    <GrpcAspNetCoreServerPackageVersion>0.1.19-pre1</GrpcAspNetCoreServerPackageVersion>
+    <GrpcCorePackageVersion>1.19.0-pre1</GrpcCorePackageVersion>
+    <GrpcToolsPackageVersion>1.19.0-pre1</GrpcToolsPackageVersion>
     <IdentityServer4AspNetIdentityPackageVersion>2.3.0</IdentityServer4AspNetIdentityPackageVersion>
     <IdentityServer4EntityFrameworkPackageVersion>2.3.0</IdentityServer4EntityFrameworkPackageVersion>
     <IdentityServer4PackageVersion>2.3.0</IdentityServer4PackageVersion>
-    <GoogleProtobufPackageVersion>3.1.0</GoogleProtobufPackageVersion>
     <MessagePackPackageVersion>1.7.3.4</MessagePackPackageVersion>
     <MoqPackageVersion>4.10.0</MoqPackageVersion>
     <MonoCecilPackageVersion>0.10.1</MonoCecilPackageVersion>
diff --git a/eng/scripts/CodeCheck.ps1 b/eng/scripts/CodeCheck.ps1
index b97428395a..4836a20c36 100644
--- a/eng/scripts/CodeCheck.ps1
+++ b/eng/scripts/CodeCheck.ps1
@@ -88,8 +88,8 @@ try {
 
     Get-ChildItem "$repoRoot/*.sln" -Recurse `
         | ? {
-            # This .sln file is used by the templating engine.
-            $_.Name -ne "RazorComponentsWeb-CSharp.sln"
+            # These .sln files are used by the templating engine.
+            ($_.Name -ne "RazorComponentsWeb-CSharp.sln") -and ($_.Name -ne "GrpcService-CSharp.sln")
         } `
         | % {
         Write-Host "  Checking $(Split-Path -Leaf $_)"
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Client.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Client.csproj.in
new file mode 100644
index 0000000000..c398043b02
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Client.csproj.in
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <LangVersion>7.1</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Protobuf Include="..\Protos\*.proto" GrpcServices="Client" />
+    <Content Include="@(Protobuf)" LinkBase="" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Grpc.Core" Version="${GrpcCorePackageVersion}" />
+    <PackageReference Include="Google.Protobuf" Version="${GoogleProtobufPackageVersion}" />
+
+    <PackageReference Include="Grpc.Tools" Version="${GrpcToolsPackageVersion}" PrivateAssets="All" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Server.csproj.in b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Server.csproj.in
new file mode 100644
index 0000000000..aa8b5a00e9
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/GrpcService-CSharp.Server.csproj.in
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Protobuf Include="..\Protos\*.proto" GrpcServices="Server" />
+    <Content Include="@(Protobuf)" LinkBase="" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Grpc.AspNetCore.Server" Version="${GrpcAspNetCoreServerPackageVersion}" />
+    <PackageReference Include="Google.Protobuf" Version="${GoogleProtobufPackageVersion}" />
+
+    <PackageReference Include="Grpc.Tools" Version="${GrpcToolsPackageVersion}" PrivateAssets="All" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/Microsoft.DotNet.Web.ProjectTemplates.csproj b/src/ProjectTemplates/Web.ProjectTemplates/Microsoft.DotNet.Web.ProjectTemplates.csproj
index 4f1917eb70..3172968d9e 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/Microsoft.DotNet.Web.ProjectTemplates.csproj
+++ b/src/ProjectTemplates/Web.ProjectTemplates/Microsoft.DotNet.Web.ProjectTemplates.csproj
@@ -12,6 +12,10 @@
   <PropertyGroup>
     <!-- Lists the versions of dependencies not built in this repo. Packages produced from this repo should be listed as a PackageVersionVariableReference.  -->
     <GeneratedContentProperties>
+      GoogleProtobufPackageVersion=$(GoogleProtobufPackageVersion);
+      GrpcAspNetCoreServerPackageVersion=$(GrpcAspNetCoreServerPackageVersion);
+      GrpcCorePackageVersion=$(GrpcCorePackageVersion);
+      GrpcToolsPackageVersion=$(GrpcToolsPackageVersion);
       MicrosoftAspNetCoreMvcRazorRuntimeCompilationPackageVersion=$(MicrosoftAspNetCoreMvcRazorRuntimeCompilationPackageVersion);
       MicrosoftEntityFrameworkCoreSqlitePackageVersion=$(MicrosoftEntityFrameworkCoreSqlitePackageVersion);
       MicrosoftEntityFrameworkCoreSqlServerPackageVersion=$(MicrosoftEntityFrameworkCoreSqlServerPackageVersion);
@@ -39,6 +43,8 @@
   <ItemGroup>
     <GeneratedContent Include="EmptyWeb-CSharp.csproj.in" OutputPath="content/EmptyWeb-CSharp/Company.WebApplication1.csproj" />
     <GeneratedContent Include="EmptyWeb-FSharp.fsproj.in" OutputPath="content/EmptyWeb-FSharp/Company.WebApplication1.fsproj" />
+    <GeneratedContent Include="GrpcService-CSharp.Server.csproj.in" OutputPath="content/GrpcService-CSharp/GrpcService-CSharp.Server/GrpcService-CSharp.Server.csproj" />
+    <GeneratedContent Include="GrpcService-CSharp.Client.csproj.in" OutputPath="content/GrpcService-CSharp/GrpcService-CSharp.Client/GrpcService-CSharp.Client.csproj" />
     <GeneratedContent Include="RazorComponentsWeb-CSharp.csproj.in" OutputPath="content/RazorComponentsWeb-CSharp/RazorComponentsWeb-CSharp.csproj" />
     <GeneratedContent Include="RazorPagesWeb-CSharp.csproj.in" OutputPath="content/RazorPagesWeb-CSharp/Company.WebApplication1.csproj" />
     <GeneratedContent Include="RazorClassLibrary-CSharp.csproj.in" OutputPath="content/RazorClassLibrary-CSharp/Company.RazorClassLibrary1.csproj" />
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/dotnetcli.host.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/dotnetcli.host.json
new file mode 100644
index 0000000000..51aa5b982e
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/dotnetcli.host.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "http://json.schemastore.org/dotnetcli.host",
+  "symbolInfo": {
+    "skipRestore": {
+      "longName": "no-restore",
+      "shortName": ""
+    },
+    "ExcludeLaunchSettings": {
+      "longName": "exclude-launch-settings",
+      "shortName": ""
+    }
+  },
+  "usageExamples": [
+    ""
+  ]
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/template.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/template.json
new file mode 100644
index 0000000000..665a8e064c
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/template.json
@@ -0,0 +1,102 @@
+{
+  "$schema": "http://json.schemastore.org/template",
+  "author": "Microsoft",
+  "classifications": [
+    "Web",
+    "gRPC"
+  ],
+  "name": "ASP.NET Core gRPC Service",
+  "generatorVersions": "[1.0.0.0-*)",
+  "description": "A project template for creating a gRPC ASP.NET Core service.",
+  "groupIdentity": "Microsoft.Web.Grpc",
+  "precedence": "5000",
+  "identity": "Microsoft.Grpc.Service.CSharp.3.0",
+  "shortName": "grpc",
+  "tags": {
+    "language": "C#",
+    "type": "project"
+  },
+  "sourceName": "GrpcService-CSharp",
+  "preferNameDirectory": true,
+  "guids": [
+    "4C26868E-5E7C-458D-82E3-040509D0C71F",
+    "5990939C-7E7B-4CFA-86FF-44CA5756498A",
+    "650B3CE7-2E93-4CC4-9F46-466686815EAA"
+  ],
+  "sources": [
+    {
+      "modifiers": [
+        {
+          "condition": "(ExcludeLaunchSettings)",
+          "exclude": [
+            "GrpcService-CSharp.Server/Properties/launchSettings.json"
+          ]
+        },
+        {
+          "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\")",
+          "exclude": [
+            "GrpcService-CSharp.sln"
+          ]
+        }
+      ]
+    }
+  ],
+  "symbols": {
+    "HostIdentifier": {
+      "type": "bind",
+      "binding": "HostIdentifier"
+    },
+    "Framework": {
+      "type": "parameter",
+      "description": "The target framework for the project.",
+      "datatype": "choice",
+      "choices": [
+        {
+          "choice": "netcoreapp3.0",
+          "description": "Target netcoreapp3.0"
+        }
+      ],
+      "defaultValue": "netcoreapp3.0"
+    },
+    "ExcludeLaunchSettings": {
+      "type": "parameter",
+      "datatype": "bool",
+      "defaultValue": "false",
+      "description": "Whether to exclude launchSettings.json from the generated template."
+    },
+    "skipRestore": {
+      "type": "parameter",
+      "datatype": "bool",
+      "description": "If specified, skips the automatic restore of the project on create.",
+      "defaultValue": "false"
+    }
+  },
+  "primaryOutputs": [
+    {
+      "condition": "(HostIdentifier == \"dotnetcli\" || HostIdentifier == \"dotnetcli-preview\")",
+      "path": "GrpcService-CSharp.sln"
+    },
+    {
+      "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\")",
+      "path": "GrpcService-CSharp.Server/GrpcService-CSharp.Server.csproj"
+    },
+    {
+      "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\")",
+      "path": "GrpcService-CSharp.Client/GrpcService-CSharp.Client.csproj"
+    }
+  ],
+  "defaultName": "GrpcService-CSharp1",
+  "postActions": [
+    {
+      "condition": "(!skipRestore)",
+      "description": "Restore NuGet packages required by this project.",
+      "manualInstructions": [
+        {
+          "text": "Run 'dotnet restore'"
+        }
+      ],
+      "actionId": "210D431B-A78B-4D2F-B762-4ED3E3EA9025",
+      "continueOnError": true
+    }
+  ]
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3.host.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3.host.json
new file mode 100644
index 0000000000..56170fd196
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3.host.json
@@ -0,0 +1,19 @@
+{
+  "$schema": "http://json.schemastore.org/vs-2017.3.host",
+  "name": {
+    "text": "gRPC Service",
+    "package": "{0CD94836-1526-4E85-87D3-FB5274C5AFC9}",
+    "id": "1027"
+  },
+  "description": {
+    "text": "A project template for creating a gRPC ASP.NET Core service.",
+    "package": "{0CD94836-1526-4E85-87D3-FB5274C5AFC9}",
+    "id": "1028"
+  },
+  "order": 100,
+  "icon": "vs-2017.3/Empty.png",
+  "learnMoreLink": "https://go.microsoft.com/fwlink/?LinkID=784883",
+  "uiFilters": [ "oneaspnet" ],
+  "supportsDocker": true,
+  "excludeLaunchSettings": false
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3/Empty.png b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/.template.config/vs-2017.3/Empty.png
new file mode 100644
index 0000000000000000000000000000000000000000..ea4b7e2492e49a6cbf0f4c8974264f780a26dfda
GIT binary patch
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uOL0!d-`gw^cf37oer<}XcYFQ*2bagz!v|I0rx*Y|%i!ti=d#Wzp$Pyk#CA9U

literal 0
HcmV?d00001

diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Client/Program.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Client/Program.cs
new file mode 100644
index 0000000000..85eb152614
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Client/Program.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Greet;
+using Grpc.Core;
+
+namespace GrpcService_CSharp
+{
+    public class Program
+    {
+        static async Task Main(string[] args)
+        {
+            // Include port of the gRPC server as an application argument
+            var port = args.Length > 0 ? args[0] : "50051";
+
+            var channel = new Channel("localhost:" + port, ChannelCredentials.Insecure);
+            var client = new Greeter.GreeterClient(channel);
+
+            var reply = await client.SayHelloAsync(new HelloRequest { Name = "GreeterClient" });
+            Console.WriteLine("Greeting: " + reply.Message);
+
+            await channel.ShutdownAsync();
+
+            Console.WriteLine("Press any key to exit...");
+            Console.ReadKey();
+        }
+    }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Program.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Program.cs
new file mode 100644
index 0000000000..94905231a0
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Program.cs
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Hosting;
+
+namespace GrpcService_CSharp
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateHostBuilder(args).Build().Run();
+        }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureWebHostDefaults(webBuilder =>
+                {
+                    webBuilder.UseStartup<Startup>();
+                });
+    }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Properties/launchSettings.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Properties/launchSettings.json
new file mode 100644
index 0000000000..6e2866b911
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Properties/launchSettings.json
@@ -0,0 +1,12 @@
+{
+  "profiles": {
+    "GrpcService-CSharp": {
+      "commandName": "Project",
+      "launchBrowser": false,
+      "applicationUrl": "http://localhost:50051",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Services/GreeterService.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Services/GreeterService.cs
new file mode 100644
index 0000000000..2e67465c6e
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Services/GreeterService.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Greet;
+using Grpc.Core;
+
+namespace GrpcService_CSharp
+{
+    public class GreeterService : Greeter.GreeterBase
+    {
+        public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
+        {
+            return Task.FromResult(new HelloReply
+            {
+                Message = "Hello " + request.Name
+            });
+        }
+    }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Startup.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Startup.cs
new file mode 100644
index 0000000000..fd4841db07
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/Startup.cs
@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
+namespace GrpcService_CSharp
+{
+    public class Startup
+    {
+        // This method gets called by the runtime. Use this method to add services to the container.
+        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddGrpc();
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+
+            app.UseRouting(routes =>
+            {
+                routes.MapGrpcService<GreeterService>();
+            });
+        }
+    }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.Development.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.Development.json
new file mode 100644
index 0000000000..e203e9407e
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.Development.json
@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Debug",
+      "System": "Information",
+      "Microsoft": "Information"
+    }
+  }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.json b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.json
new file mode 100644
index 0000000000..efb26250e8
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.Server/appsettings.json
@@ -0,0 +1,14 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+  "AllowedHosts": "*",
+  "Kestrel": {
+    "EndpointDefaults": {
+      "Protocols": "Http2"
+    }
+  }
+}
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.sln b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.sln
new file mode 100644
index 0000000000..929080211c
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/GrpcService-CSharp.sln
@@ -0,0 +1,50 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27130.2027
+MinimumVisualStudioVersion = 15.0.26124.0
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GrpcService-CSharp.Server", "GrpcService-CSharp.Server\GrpcService-CSharp.Server.csproj", "{650B3CE7-2E93-4CC4-9F46-466686815EAA}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GrpcService-CSharp.Client", "GrpcService-CSharp.Client\GrpcService-CSharp.Client.csproj", "{5990939C-7E7B-4CFA-86FF-44CA5756498A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x64.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x86.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x64.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x64.Build.0 = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x86.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x86.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x64.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x86.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x64.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x64.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x86.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4C26868E-5E7C-458D-82E3-040509D0C71F}
+	EndGlobalSection
+EndGlobal
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/Protos/greet.proto b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/Protos/greet.proto
new file mode 100644
index 0000000000..75721ab7d1
--- /dev/null
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/GrpcService-CSharp/Protos/greet.proto
@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+package Greet;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings.
+message HelloReply {
+  string message = 1;
+}

From 26006e5b10ce73110370a517edf956c77e21a18c Mon Sep 17 00:00:00 2001
From: Artak Mkrtchyan <artakm@corp.microsoft.com>
Date: Thu, 21 Feb 2019 13:42:53 -0800
Subject: [PATCH 3/3] Updated the survey link for 0.9 release

---
 .../BlazorHosted-CSharp.Client/Shared/SurveyPrompt.cshtml       | 2 +-
 .../content/BlazorStandalone-CSharp/Shared/SurveyPrompt.cshtml  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Components/Blazor/Templates/src/content/BlazorHosted-CSharp/BlazorHosted-CSharp.Client/Shared/SurveyPrompt.cshtml b/src/Components/Blazor/Templates/src/content/BlazorHosted-CSharp/BlazorHosted-CSharp.Client/Shared/SurveyPrompt.cshtml
index 7264f2d548..e534ca64fc 100644
--- a/src/Components/Blazor/Templates/src/content/BlazorHosted-CSharp/BlazorHosted-CSharp.Client/Shared/SurveyPrompt.cshtml
+++ b/src/Components/Blazor/Templates/src/content/BlazorHosted-CSharp/BlazorHosted-CSharp.Client/Shared/SurveyPrompt.cshtml
@@ -4,7 +4,7 @@
 
     <span class="text-nowrap">
         Please take our
-        <a target="_blank" class="font-weight-bold" href="https://go.microsoft.com/fwlink/?linkid=2069004">brief survey</a>
+        <a target="_blank" class="font-weight-bold" href="https://go.microsoft.com/fwlink/?linkid=2077509">brief survey</a>
     </span>
     and tell us what you think.
 </div>
diff --git a/src/Components/Blazor/Templates/src/content/BlazorStandalone-CSharp/Shared/SurveyPrompt.cshtml b/src/Components/Blazor/Templates/src/content/BlazorStandalone-CSharp/Shared/SurveyPrompt.cshtml
index 7264f2d548..e534ca64fc 100644
--- a/src/Components/Blazor/Templates/src/content/BlazorStandalone-CSharp/Shared/SurveyPrompt.cshtml
+++ b/src/Components/Blazor/Templates/src/content/BlazorStandalone-CSharp/Shared/SurveyPrompt.cshtml
@@ -4,7 +4,7 @@
 
     <span class="text-nowrap">
         Please take our
-        <a target="_blank" class="font-weight-bold" href="https://go.microsoft.com/fwlink/?linkid=2069004">brief survey</a>
+        <a target="_blank" class="font-weight-bold" href="https://go.microsoft.com/fwlink/?linkid=2077509">brief survey</a>
     </span>
     and tell us what you think.
 </div>