diff --git a/build/dependencies.props b/build/dependencies.props
index e2ad411a23..dc9945767a 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,7 +3,7 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15742</InternalAspNetCoreSdkPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15744</InternalAspNetCoreSdkPackageVersion>
     <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>
     <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsDependencyInjectionPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index e40ef6651b..f531e7b0f7 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview2-15742
-commithash:21fbb0f2c3fe4a9216e2d59632b98cfd7d685962
+version:2.1.0-preview2-15744
+commithash:9e15cb6062ab5b9790d3fa699e018543a6950713
diff --git a/src/Microsoft.AspNetCore.Html.Abstractions/baseline.netcore.json b/src/Microsoft.AspNetCore.Html.Abstractions/baseline.netcore.json
index 7e3a4d0d00..b0b320e216 100644
--- a/src/Microsoft.AspNetCore.Html.Abstractions/baseline.netcore.json
+++ b/src/Microsoft.AspNetCore.Html.Abstractions/baseline.netcore.json
@@ -1,5 +1,5 @@
 {
-  "AssemblyIdentity": "Microsoft.AspNetCore.Html.Abstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60",
+  "AssemblyIdentity": "Microsoft.AspNetCore.Html.Abstractions, Version=2.0.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60",
   "Types": [
     {
       "Name": "Microsoft.AspNetCore.Html.HtmlContentBuilder",
@@ -9,6 +9,14 @@
         "Microsoft.AspNetCore.Html.IHtmlContentBuilder"
       ],
       "Members": [
+        {
+          "Kind": "Method",
+          "Name": "get_Count",
+          "Parameters": [],
+          "ReturnType": "System.Int32",
+          "Visibility": "Public",
+          "GenericParameter": []
+        },
         {
           "Kind": "Method",
           "Name": "Append",
diff --git a/src/Microsoft.Extensions.WebEncoders/baseline.netcore.json b/src/Microsoft.Extensions.WebEncoders/baseline.netcore.json
index db16203ed1..cc93cc7458 100644
--- a/src/Microsoft.Extensions.WebEncoders/baseline.netcore.json
+++ b/src/Microsoft.Extensions.WebEncoders/baseline.netcore.json
@@ -1,5 +1,5 @@
 {
-  "AssemblyIdentity": "Microsoft.Extensions.WebEncoders, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60",
+  "AssemblyIdentity": "Microsoft.Extensions.WebEncoders, Version=2.0.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60",
   "Types": [
     {
       "Name": "Microsoft.Extensions.WebEncoders.WebEncoderOptions",