From 406d8f9a8102e9f35f724629633a766491dddecc Mon Sep 17 00:00:00 2001
From: Ben Adams <thundercat@illyriad.co.uk>
Date: Mon, 9 Apr 2018 07:28:37 +0100
Subject: [PATCH] readonly readonly structs (#1908)

---
 src/Common/ForceAsyncAwaiter.cs                               | 4 ++--
 .../Internal/TaskExtensions.cs                                | 2 +-
 .../Internal/AwaitableThreadPool.cs                           | 2 +-
 src/Microsoft.AspNetCore.SignalR.Client.Core/HubConnection.cs | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/Common/ForceAsyncAwaiter.cs b/src/Common/ForceAsyncAwaiter.cs
index 4c0a66da68..670fa00786 100644
--- a/src/Common/ForceAsyncAwaiter.cs
+++ b/src/Common/ForceAsyncAwaiter.cs
@@ -26,7 +26,7 @@ namespace System.Threading.Tasks
         }
     }
 
-    internal struct ForceAsyncAwaiter : ICriticalNotifyCompletion
+    internal readonly struct ForceAsyncAwaiter : ICriticalNotifyCompletion
     {
         private readonly Task _task;
 
@@ -50,7 +50,7 @@ namespace System.Threading.Tasks
         }
     }
 
-    internal struct ForceAsyncAwaiter<T> : ICriticalNotifyCompletion
+    internal readonly struct ForceAsyncAwaiter<T> : ICriticalNotifyCompletion
     {
         private readonly Task<T> _task;
 
diff --git a/src/Microsoft.AspNetCore.Http.Connections.Client/Internal/TaskExtensions.cs b/src/Microsoft.AspNetCore.Http.Connections.Client/Internal/TaskExtensions.cs
index c79e2f66c4..c0c6965542 100644
--- a/src/Microsoft.AspNetCore.Http.Connections.Client/Internal/TaskExtensions.cs
+++ b/src/Microsoft.AspNetCore.Http.Connections.Client/Internal/TaskExtensions.cs
@@ -14,7 +14,7 @@ namespace System.Threading.Tasks
         }
     }
 
-    internal struct NoThrowAwaiter : ICriticalNotifyCompletion
+    internal readonly struct NoThrowAwaiter : ICriticalNotifyCompletion
     {
         private readonly Task _task;
         public NoThrowAwaiter(Task task) { _task = task; }
diff --git a/src/Microsoft.AspNetCore.Http.Connections/Internal/AwaitableThreadPool.cs b/src/Microsoft.AspNetCore.Http.Connections/Internal/AwaitableThreadPool.cs
index 81c6108189..d4b14df268 100644
--- a/src/Microsoft.AspNetCore.Http.Connections/Internal/AwaitableThreadPool.cs
+++ b/src/Microsoft.AspNetCore.Http.Connections/Internal/AwaitableThreadPool.cs
@@ -16,7 +16,7 @@ namespace Microsoft.AspNetCore.Http.Connections.Internal
             return new Awaitable();
         }
 
-        public struct Awaitable : ICriticalNotifyCompletion
+        public readonly struct Awaitable : ICriticalNotifyCompletion
         {
             public void GetResult()
             {
diff --git a/src/Microsoft.AspNetCore.SignalR.Client.Core/HubConnection.cs b/src/Microsoft.AspNetCore.SignalR.Client.Core/HubConnection.cs
index c1b311d7dd..606533ed58 100644
--- a/src/Microsoft.AspNetCore.SignalR.Client.Core/HubConnection.cs
+++ b/src/Microsoft.AspNetCore.SignalR.Client.Core/HubConnection.cs
@@ -807,7 +807,7 @@ namespace Microsoft.AspNetCore.SignalR.Client
             }
         }
 
-        private struct InvocationHandler
+        private readonly struct InvocationHandler
         {
             public Type[] ParameterTypes { get; }
             private readonly Func<object[], object, Task> _callback;