Delegate and Method

I have a delegate and a method. what are the steps to call that method (give technical steps)

1. Create a delegate
2. Create a function matching the signature as per the delegate or vice-versa
3. Assign method to the delegate instance
4. Call delegate function

The entire code looks like,

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

class Program { public delegate int MYDelegate(int x, int y); static void Main(string[] args) { MYDelegate d = AddNumbers; Console.WriteLine(d(20, 30).ToString()); Console.ReadLine(); } public static int AddNumbers(int a, int b) { return (a + b); } }

Returning value from Method/Property is Risky

Value types are stored on Stack and reference types are stored on heap. Now here comes the twist as if a programmer by mistake or by intention returns a value from a method or property which is of type value it could lead to havoc.


Let’s take a look at this by an example;

After executing this program you will get the output as 0 instead of 4. This is because the property myNumber of class Arithmetics returns a copy of structure of type MyNumber and not reference type. If you replace the struct with class ypu will get result as 4 instead of 0, because in that case a reference will be passed.

What will be the impact of doing so?
If you call a method or access a property that returns a value-type object, do not modify it or call mutators (methods that modify its state or data) on it. You are dealing with a copy and any change you make does not affect the real instance.
Ref: .Net Gotchas