Enabling and conditioning the 'NuGetCommand' task.

eng/build.yml

@@ -37,6 +37,7 @@ phases:
         - group: DotNet-Symbol-Server-PATs
         - group: DotNet-HelixApi-Access
         - _DotNetPublishToBlobFeed: true
+        - _PushToVSFeed: true
         - _SignType: real
         - _BuildArgs: /p:OfficialBuildId=$(BUILD.BUILDNUMBER)
                   /p:DotNetPublishToBlobFeed=$(_DotNetPublishToBlobFeed)
@@ -98,6 +99,16 @@ phases:
                   $(_AdditionalBuildParameters)
         displayName: Build
 
+    - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest'), eq(parameters.agentOs, 'Windows_NT')) }}:
+      - task: NuGetCommand@2
+        displayName: Push Visual Studio NuPkgs
+        inputs:
+          command: push
+          packagesToPush: '$(Build.SourcesDirectory)/artifacts/packages/$(_BuildConfig)/NonShipping/VS.*.nupkg'
+          nuGetFeedType: external
+          publishFeedCredentials: 'DevDiv - VS package feed'
+        condition: and(succeeded(), eq(variables['_PushToVSFeed'], 'true'), eq(variables['_DotNetPublishToBlobFeed'], 'true'), or(eq(variables['_BuildArchitecture'], 'x64'), eq(variables['_BuildArchitecture'], 'x86')))
+
     - task: PublishTestResults@1	
       displayName: Publish Test Results	
       inputs: