using System;
using System.Runtime.CompilerServices;

public class C {

    public void InlineTest() {
 		// This method should not call anything
        // Everything can be inlined
        DoWithGuardTwice(PrintHello);
        
        //DoWithGuardTwice(()=>{Console.WriteLine("bye");});
    }
    
    public void PrintHello()
    {
        Console.WriteLine("Hello");
    }
    
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public void DoWithGuardTwice(/*Probably with some hint here*/ Action a)
    {
        lock(this)
        {
            a();
            a();
        }
    }    
}