Use the same toolset that the rest of the projects use

Author: pranavkm

src/Components/Blazor/Build/testassets/Directory.Build.props

@@ -10,4 +10,16 @@
 
     <Import Project="$(RepoRoot)eng\Versions.props" />
 
-</Project>
+    <ItemGroup>
+      <!-- Use the sample compiler \ SDK that the rest of our build uses-->
+      <PackageReference Include="Microsoft.Net.Compilers.Toolset"
+        Version="$(MicrosoftNetCompilersToolsetPackageVersion)"
+        PrivateAssets="all"
+        IsImplicitlyDefined="true" />
+
+      <PackageReference Include="Microsoft.NET.Sdk.Razor"
+        Version="$(MicrosoftNETSdkRazorPackageVersion)"
+        PrivateAssets="All"
+        IsImplicitlyDefined="true" />
+    </ItemGroup>
+</Project>