using System;

struct FieldLikeSingleton
{
	private class FieldLikeSingletonImpl
	{
	    internal FieldLikeSingletonImpl()
	    {
	        Console.WriteLine("FieldLikeSingleton.ctor");
	    }
	 
	    public void Foo()
	    {
	        Console.WriteLine("Foo");
	    }		
	}
	
	private static FieldLikeSingletonImpl instance = new FieldLikeSingletonImpl(); 
    public static FieldLikeSingleton Instance { get; }
    
    public void Foo()
    {
        instance.Foo();
    }
}
 
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Inside Main()");
        
        if (args.Length == 42)
        {
            FieldLikeSingleton.Instance.Foo();
        }
    }
}