Call the signalR method in the client method

The best way to get results from a SignalR server method is to read its return value rather than calling a client method on the caller side. For example, you can read the response from method-A like this:

proxy.Invoke("method-A", "123").ContinueWith((t) =>
{
  bool isConnected = t.Result;
});

The signature of method A is expected to be something like this:

public bool method-A(string p);

This way, you don't have to call the client method in order to return the result of the server method to the caller. You can call another server method from a callback called by another server method like this:

proxy.Invoke("method-A", "123").ContinueWith((t) =>
{
  bool isConnected = t.Result;
  if(isConnected)
  {
    proxy.Invoke("method-B", "someValue").ContinueWith((u) =>
    {
      Console.WriteLine("Method-B response: " + u.Result);
    });
  }
});

Suppose method B returns a string value on the server side.