DELEGATES

DELEGATE
public delegate void SimpleDelegate(string param);
class ....
{
    SimpleDelegate d = new SimpleDelegate(TestMethod); or SimpleDelegate d = Console.ReadLine();
    d += Console.ReadLine();
    d("text");
}

FUNCTION returns last type
Func<string, int> predefinedIntParse = int.Parse;

ACTION void methods
Action<object> predefinedAction = Console.WriteLine;