Rename AssemblyKey properties to StrongNameKeyId as part of arcade work

Commit migrated from https://github.com/dotnet/corefx/commit/7edd861bf2dd59ecdb4284e0fd291d7458198a9d

src/libraries/CoreFx.Private.TestUtilities/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>1.0.1.0</AssemblyVersion>
-    <AssemblyKey>Test</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <!-- DO NOT ship this as stable for .NET Core 2.0. -->
     <BlockStable>true</BlockStable>
   </PropertyGroup>

src/libraries/Microsoft.CSharp/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/Microsoft.Diagnostics.Tracing.EventSource.Redist/Directory.Build.props

@@ -4,6 +4,6 @@
   <PropertyGroup>
     <PackageVersion>2.1.0</PackageVersion>
     <AssemblyVersion>2.0.2.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/Microsoft.IO.Redist/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>false</IsNETCoreApp>
     <IsUAP>false</IsUAP>
   </PropertyGroup>

src/libraries/Microsoft.VisualBasic/Directory.Build.props

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <PackageVersion>10.4.0</PackageVersion>
     <AssemblyVersion>10.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/Microsoft.Win32.Primitives/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/Microsoft.Win32.Registry.AccessControl/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/Microsoft.Win32.Registry/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.2.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsNETCoreAppRef>false</IsNETCoreAppRef>
   </PropertyGroup>

src/libraries/Microsoft.Win32.SystemEvents/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/Microsoft.XmlSerializer.Generator/Directory.Build.props

@@ -6,6 +6,6 @@
     <SkipValidatePackage>true</SkipValidatePackage>
     <AssemblyVersion>2.0.0.0</AssemblyVersion>
     <AssemblyFileVersion>$(AssemblyVersion)</AssemblyFileVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>

src/libraries/System.AppContext/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Buffers/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.CodeDom/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.2.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Collections.Concurrent/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.14.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Collections.Immutable/Directory.Build.props

@@ -4,7 +4,7 @@
   <PropertyGroup>
     <PackageVersion>1.6.0</PackageVersion>
     <AssemblyVersion>1.2.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Collections.NonGeneric/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Collections.Specialized/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Collections/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ComponentModel.Annotations/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.2.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ComponentModel.Composition.Registration/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
   </PropertyGroup>
 </Project>

src/libraries/System.ComponentModel.Composition/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
   </PropertyGroup>
 </Project>

src/libraries/System.ComponentModel.EventBasedAsync/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ComponentModel.Primitives/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ComponentModel.TypeConverter/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ComponentModel/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.3.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Configuration.ConfigurationManager/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.2.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Console/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Data.Common/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Data.DataSetExtensions/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Data.Odbc/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Data.SqlClient/Directory.Build.props

@@ -5,7 +5,7 @@
     <!-- Must be kept in sync with pkg\Microsoft.Windows.Compatibility\Microsoft.Windows.Compatibility.pkgproj -->
     <PackageVersion>4.7.0</PackageVersion>
     <AssemblyVersion>4.6.0.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsUAP>true</IsUAP>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Diagnostics.Contracts/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.3.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.Debug/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.DiagnosticSource/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
     <IsUAPRef>false</IsUAPRef>

src/libraries/System.Diagnostics.EventLog/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Diagnostics.FileVersionInfo/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.3.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.PerformanceCounter/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Diagnostics.Process/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.StackTrace/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.TextWriterTraceListener/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.Tools/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.TraceSource/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Diagnostics.Tracing/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.DirectoryServices.AccountManagement/Directory.Build.props

@@ -6,6 +6,6 @@
          plan on shipping a new desktop version out of band. Instead add API
          to a different assembly. -->
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.DirectoryServices.Protocols/Directory.Build.props

@@ -6,6 +6,6 @@
          plan on shipping a new desktop version out of band. Instead add API
          to a different assembly. -->
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.DirectoryServices/Directory.Build.props

@@ -6,6 +6,6 @@
          plan on shipping a new desktop version out of band. Instead add API
          to a different assembly. -->
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Drawing.Common/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Drawing.Design.Primitives/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Drawing.Primitives/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.0.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Dynamic.Runtime/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Globalization.Calendars/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Globalization.Extensions/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Globalization/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.Compression.Brotli/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.Compression.ZipFile/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.Compression/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>ECMA</AssemblyKey>
+    <StrongNameKeyId>ECMA</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.FileSystem.AccessControl/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsNETCoreAppRef>false</IsNETCoreAppRef>
   </PropertyGroup>

src/libraries/System.IO.FileSystem.DriveInfo/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.FileSystem.Primitives/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.FileSystem.Watcher/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.FileSystem/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.IsolatedStorage/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.MemoryMappedFiles/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.Packaging/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.IO.Pipelines/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.IO.Pipes.AccessControl/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsNETCoreAppRef>false</IsNETCoreAppRef>
     <IsUAP>true</IsUAP>

src/libraries/System.IO.Pipes/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO.Ports/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.2.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsUAP>true</IsUAP>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.IO.UnmanagedMemoryStream/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.IO/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Json/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>2.0.7.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Json/src/System.Json.csproj

 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <ProjectGuid>{B11B5B76-F583-44EA-A4B7-3ABD990594F6}</ProjectGuid>
-    <!-- 
+    <!--
         System.Json is a library for compat purposes so we want to keep the same identity as it originally shipped with in Silverlight
     -->
-    <AssemblyKey>SilverlightExtension</AssemblyKey>
+    <StrongNameKeyId>MicrosoftShared</StrongNameKeyId>
     <Configurations>netstandard-Debug;netstandard-Release;netstandard1.0-Debug;netstandard1.0-Release</Configurations>
   </PropertyGroup>
   <ItemGroup>

src/libraries/System.Linq.Expressions/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Linq.Parallel/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.3.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Linq.Queryable/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.3.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Linq/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Management/Directory.Build.props

@@ -6,6 +6,6 @@
          plan on shipping a new desktop version out of band. Instead add API
          to a different assembly. -->
     <AssemblyVersion>4.0.0.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Memory/Directory.Build.props

@@ -5,7 +5,7 @@
     <!-- System.Memory has forwarded types into the runtime on netcoreapp/uap
          It must win over assemblies versioned at 4.0.* -->
     <AssemblyVersion>4.1.0.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Http.Rtc/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsUAP>true</IsUAP>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Net.Http.WinHttpHandler/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Net.Http/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.HttpListener/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Mail/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.NameResolution/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.NetworkInformation/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Ping/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Primitives/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Requests/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Security/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.ServicePoint/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.Sockets/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.2.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.WebClient/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.WebHeaderCollection/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.WebProxy/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.WebSockets.Client/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Net.WebSockets.WebSocketProtocol/Directory.Build.props

@@ -3,6 +3,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.1.0</AssemblyVersion>
-    <AssemblyKey>Open</AssemblyKey>
+    <StrongNameKeyId>Open</StrongNameKeyId>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Net.WebSockets/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.Numerics.Vectors.WindowsRuntime/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.0.4.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsUAP>true</IsUAP>
   </PropertyGroup>
 </Project>
\ No newline at end of file

src/libraries/System.Numerics.Vectors/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.5.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>

src/libraries/System.ObjectModel/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <AssemblyVersion>4.1.1.0</AssemblyVersion>
-    <AssemblyKey>MSFT</AssemblyKey>
+    <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IsNETCoreApp>true</IsNETCoreApp>
     <IsUAP>true</IsUAP>
   </PropertyGroup>