Use PackageReference instead of project.json in the VSIX project (#1642)

build/dependencies.props

@@ -22,7 +22,10 @@
     <StreamJsonRpcVersion>1.1.92</StreamJsonRpcVersion>
     <TestSdkVersion>15.3.0</TestSdkVersion>
 
-    <!-- Must keep in sync with tooling\Microsoft.VisualStudio.RazorExtension\project.json -->
+    <!--
+      Must keep in sync with tooling\Microsoft.VisualStudio.RazorExtension\ until we can use this MSBuild property.
+      See https://github.com/dotnet/project-system/issues/2129
+     -->
     <VsShellVersion>15.0.26606</VsShellVersion>
 
     <XunitAnalyzersVersion>0.6.1</XunitAnalyzersVersion>

tooling/Microsoft.VisualStudio.RazorExtension/Microsoft.VisualStudio.RazorExtension.csproj

@@ -95,7 +95,6 @@
     <Content Include="WebConfiguration.png">
       <IncludeInVSIX>true</IncludeInVSIX>
     </Content>
-    <None Include="project.json" />
     <None Include="source.extension.vsixmanifest">
       <SubType>Designer</SubType>
     </None>
@@ -208,6 +207,15 @@
       </IncludeOutputGroupsInVSIXLocalOnly>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <!--
+      Versions must be written here instead of being set as MSBuild variable.
+      See https://github.com/dotnet/project-system/issues/2129.
+    -->
+    <PackageReference Include="Microsoft.VisualStudio.ComponentModelHost" Version="15.0.26606" />
+    <PackageReference Include="Microsoft.VisualStudio.Shell.15.0" Version="15.0.26606" />
+    <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="15.1.192" />
+  </ItemGroup>
   <ItemDefinitionGroup>
     <SuppressFromVsix>
       <Visible>false</Visible>

tooling/Microsoft.VisualStudio.RazorExtension/project.json

@@ -1,14 +0,0 @@
-{
-  "frameworks": {
-    "net46": {
-      "dependencies": {
-        "Microsoft.VisualStudio.ComponentModelHost": "15.0.26606",
-        "Microsoft.VisualStudio.Shell.15.0": "15.0.26606",
-        "Microsoft.VSSDK.BuildTools": "15.1.192"
-      }
-    }
-  },
-  "runtimes": {
-    "win": { }
-  }
-}