Fix the Revolving Buffers tests failures by explicitly using the function.

test/Microsoft.VisualStudio.Web.BrowserLink.Test/Microsoft.VisualStudio.Web.BrowserLink.Test.csproj

@@ -18,4 +18,8 @@
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
+
 </Project>

test/Microsoft.VisualStudio.Web.BrowserLink.Test/RevolvingBuffersTest.cs

@@ -560,7 +560,7 @@ namespace Microsoft.VisualStudio.Web.BrowserLink
 
         private static string GetString(ArraySegment<char> arraySegment)
         {
-            return new string(arraySegment.ToArray());
+            return new string(Enumerable.ToArray(arraySegment));
         }
     }
 }