Mark System.IO.Pipes Unsupported at assembly level (#41976)

Co-authored-by: Mitchell Hwang <mitchell.hwang@microsoft.com>

diff --git a/src/libraries/System.IO.Pipes/Directory.Build.props b/src/libraries/System.IO.Pipes/Directory.Build.props
index d68d22c..ce244cb 100644 (file)
--- a/src/libraries/System.IO.Pipes/Directory.Build.props
+++ b/src/libraries/System.IO.Pipes/Directory.Build.props
@@ -3,5 +3,6 @@
   <PropertyGroup>
     <StrongNameKeyId>Microsoft</StrongNameKeyId>
     <IncludePlatformAttributes>true</IncludePlatformAttributes>
+    <UnsupportedOSPlatforms>browser</UnsupportedOSPlatforms>
   </PropertyGroup>
 </Project>
\ No newline at end of file