In your example, once you've assigned a delegate to a variable, you can pass it around like any other variable. You can create a method accepting a delegate as a parameter, and it can invoke the delegate without needing to know where the method is really declared.
private int DoSomeOperation( Operations operation )
{
return operation.Invoke(5,5);
}
...
MyClass f = new MyClass();
Operations p = new Operations(f.multiply);
int result = DoSomeOperation( p );
Delegates make methods into things that you can pass around in the same way as an int. You could say that variables don't give you anything extra because in
int i = 5;
Console.Write( i + 10 );
you see the value 5 being specified, so you might as well just say Console.Write( 5 + 10 ). It's true in that case, but it misses the benefits for being able to say
DateTime nextWeek = DateTime.Now.AddDays(7);
instead of having to define a specifc DateTime.AddSevenDays() method, and an AddSixDays method, and so on.
