[wasm] Mark System.IO.IsolatedStorage APIs as unsupported on Browser (#41700)

* [wasm] System.IO.IsolatedStorage enable platform attributes

* Mark System.IO.IsolatedStorage Unsupported at assembly level

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

diff --git a/src/libraries/System.IO.IsolatedStorage/Directory.Build.props b/src/libraries/System.IO.IsolatedStorage/Directory.Build.props
index 63f02a0..ce244cb 100644 (file)
--- a/src/libraries/System.IO.IsolatedStorage/Directory.Build.props
+++ b/src/libraries/System.IO.IsolatedStorage/Directory.Build.props
@@ -2,5 +2,7 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Microsoft</StrongNameKeyId>
+    <IncludePlatformAttributes>true</IncludePlatformAttributes>
+    <UnsupportedOSPlatforms>browser</UnsupportedOSPlatforms>
   </PropertyGroup>
 </Project>
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