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

SomeDelegate a = Inc;
Func b = Inc;

is short for

SomeDelegate a = new SomeDelegate(Inc); // no cast here
Func b = new Func(Inc);

You can't cast an instance of SomeDelegate to a Func for the same reason you can't cast a string to a Dictionary -- they're different types.

This works:

Func c = x => a(x);

which is syntactic sugar for

class MyLambda
{
   SomeDelegate a;
   public MyLambda(SomeDelegate a) { this.a = a; }
   public int Invoke(int x) { return this.a(x); }
}

Func c = new Func(new MyLambda(a).Invoke);