From 3143d9550014006080bb0def5b5c96608b025a13 Mon Sep 17 00:00:00 2001
From: Martin Costello <martin@martincostello.com>
Date: Tue, 6 Apr 2021 19:19:32 +0100
Subject: [PATCH] [MVC] Fix MSB4186 error (#31066)

Fix MSB4186 error if a project references Microsoft.AspNetCore.Mvc.Testing that is not itself an ASP.NET project, such as a helper library in a test suite.
---
 .../Mvc.Testing/src/Microsoft.AspNetCore.Mvc.Testing.targets    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Mvc/Mvc.Testing/src/Microsoft.AspNetCore.Mvc.Testing.targets b/src/Mvc/Mvc.Testing/src/Microsoft.AspNetCore.Mvc.Testing.targets
index e9f795b0241e..b999ce824447 100644
--- a/src/Mvc/Mvc.Testing/src/Microsoft.AspNetCore.Mvc.Testing.targets
+++ b/src/Mvc/Mvc.Testing/src/Microsoft.AspNetCore.Mvc.Testing.targets
@@ -29,7 +29,7 @@
     </Target>
 
   <Target Name="_AddContentRootForProjectReferences" BeforeTargets="PrepareResources" DependsOnTargets="_ResolveMvcTestProjectReferences">
-    <ItemGroup>
+    <ItemGroup Condition="'@(_ContentRootProjectReferences->Count())' != 0">
       <_ManifestProjects Include="%(_ContentRootProjectReferences.FusionName)">
         <ContentRoot>$([System.IO.Path]::GetDirectoryName(%(_ContentRootProjectReferences.MSBuildSourceProjectFile)))</ContentRoot>
       </_ManifestProjects>