Question

I declared a delegate:

public delegate void Del(string message);

Then i created a function that i want to add to the delegate:

public static void DelegateMethod(string message)
{
    System.Console.WriteLine(message);
}

Now I add the function to the delegate and call it:

Del handler = new Del( DelegateMethod);
handler("Hello World");
Console.Read();

Why when I drop the static from the DelegateMethod do I get an error?

Why does the function I delegate have to be static?

Answer 1

why when i drop the “static” from the DelegateMethod i get an error?

Because you are writing this code inside a static method. Given the fact that you are using Console.Read I presume you have put this code inside the static void Main method of your console application. If you wanted to drop the static keyword from the method you will need an instance of the class containing this method. Like this:

class Program
{
    public delegate void Del(string message);

    public void DelegateMethod(string message)
    {
        System.Console.WriteLine(message);
    }

    static void Main()
    {
        Del handler = new Del(new Program().DelegateMethod);
        handler("Hello World");
        Console.Read();
    }
}