Cast delegate to Func in C#

Question

I have code:

public delegate int SomeDelegate(int p);

public static int Inc(int p) {
    return p + 1;
}

I can cast Inc to

Answer 1

I like examples. Here is my example code:

class Program
{
    class A
    {
        public A(D d) { d.Invoke("I'm A!"); }
        public delegate string D(string s);
    }

    class B
    {
        public delegate string D(string s);
    }
    static void Main(string[] args)
    {
        //1. Func to delegates 

        string F(dynamic s) { Console.WriteLine(s); return s; }
        Func f = F;
        //new A(f);//Error CS1503  Argument 1: cannot convert from 'System.Func' to 'ConsoleApp3.Program.A.D'  
        new A(new A.D(f));//I'm A!
        new A(x=>f(x));//I'm A!

        Func f2 = s => { Console.WriteLine(s); return s; };
        //new A(f2);//Same as A(f)
        new A(new A.D(f2));//I'm A!
        new A(x => f2(x));//I'm A!

        //You can even convert between delegate types
        new A(new A.D(new B.D(f)));//I'm A!



        //2. delegate to F

        A.D d = s => { Console.WriteLine(s); return s; };

        Func f3 = d.Invoke;
        f3("I'm f3!");//I'm f3!
        Func f4 = new Func(d);
        f4("I'm f4!");//I'm f4!


        Console.ReadLine();
    }
}

The output is: