C# compiler oddity with delegate constructors

Question

Based on the following question, I found some odd behaviour of the c# compiler.

The following is valid C#:

static void K() {}

static void Main()
{
          


        

Answer 1

• delegate is a class

• Action delegate has a constructor like so

  public extern Action(object @object, IntPtr method);

• Since K is a static method there is no need to pass object to inner most action instance as first argument and hence it passes null

• Since second argument is pointer to function therefore it passes pointer of K method using ldftn function
• for the remaining Action instances the object is passed is inner Action and the second parameter is the Invoke method since when you call a delegate you're actually calling the Invoke method

Summary

var action = new Action(K) => Action action = new Action(null, ldftn(K))
new Action(action) => new Action(action, ldftn(Action.Invoke))

I hope this explains what is happening?