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Understanding delegates in C# - did I get it right? Part 2

bugmagnet profile image Bruce Axtens ・1 min read

The young man wrote back, unpacking his original question a little. This is what he said following by my response. Am I right?

Now I am interested to know that in GiveAction() method, when we pass the reference of Method1, we directly write the name Method1. Normally when we call a non static method we need to write the instance variable first then we write the name of method in which we are interested.

I don't think I'm understanding the question. But I'll keep trying.

When you're giving Method1 to the return value of GetAction that's getting resolved at compile time for the instance-local method of the same name.

Your code from last time could be written like this:

using System;
using System.Diagnostics;

class Program
{
    int i = 4;
    static void Main(string[] args)
    {
        Debugger.Launch();
        Program p = new Program();
        Action y1 = p.GiveAction();
        y1();
        y1();
        Console.WriteLine(p.i);
    }
    private Action GiveAction()
    {
        Action ga = Method1;
        return ga;
        /*
        this also works

        return (Action)Method1;
        */
    }
    public void Method1()
    {
        this.i++;
    }

}
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Notice the two different ways of specifying the return value of GiveAction. That and the way you were doing it originally all hand back an Action delegate to Main which gets stored in the Action delegate named y1.

GiveAction and Method1 are both executing in the context of the instantiated Program object stored in p. They don't need further qualification because they are not objects themselves that need to be instantiated.

کیا میں قریب ہوں؟

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