Question

I have

public static void SecureTcpRpc<InterfaceType>(string uri, 
                                               Action<InterfaceType> action) 
                                              where InterfaceType : class;

Then I use that here

 private static AuthorizedActionResult 
                RunChannelAction<T>(IEnumerable<string> uris, 
                                    Func<T, AuthorizedActionResult> actionFunc)
                                    where T : IPingable
            {
                    WcfClient.SecureTcpRpc<T>....

THe compiler does not like that I have constrained T to be IPingable. I dont see why it objects. IPingable is a reference type, so it matches the constraint on the SecureTpcRpc method. But the compiler says ‘T must be a reference type’

Answer 1

I think you need the “class” constraint on the AuthorizedActionResult function also for it to work.

where T : class, IPingable