use InternalsVisibleTo tag

Author: mikaelm12

src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj

@@ -19,4 +19,11 @@
     <Reference Include="Microsoft.Extensions.Logging.Abstractions" />
   </ItemGroup>
 
+  <ItemGroup>
+    <InternalsVisibleTo Include="Microsoft.AspNetCore.SignalR.Microbenchmarks" />
+    <InternalsVisibleTo Include="Microsoft.AspNetCore.SignalR.Tests" />
+    <InternalsVisibleTo Include="Microsoft.AspNetCore.SignalR.Client.Tests" />
+    <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
+  </ItemGroup>
+
 </Project>