MVVM Light Messenger executing multiple times

Question

I am using MVVM Light and am using Messages to communicate between ViewModels to let a ViewModel know when it is ok to execute something. My problem is that I register for

Answer 1

Very old question but I solved the problem by doing this:

static bool isRegistered = false;

and then, in the constructor:

if( !isRegistered )
{
   Messenger.Default.Register(this, OnMessageReceived);
   isRegisterd = true;
}