Cast to generic type in C#

Question

I have a Dictionary to map a certain type to a certain generic object for that type. For example:

typeof(LoginMessage) maps to MessageProcessor

        

Answer 1

This is simply not allowed:

Type key = message.GetType();
MessageProcessor processor = messageProcessors[key] as MessageProcessor;

You cannot get a generic type as a variable value.

You'd have to do a switch or something:

Type key = message.GetType();
if (key == typeof(Foo))
{
    MessageProcessor processor = (MessageProcessor)messageProcessors[key];
    // Do stuff with processor
}
else if (key == typeof(Bar))
{
    MessageProcessor processor = (MessageProcessor)messageProcessors[key];
    // Do stuff with processor
}
...