using System;

public class Program

{

    public static void Main()

    {

        Foo foo;

        foo.Bar = 42;

        Foo poop = new Foo();

        poop.Bar = 1337;

        Foo muh = new Foo(42);

        Console.WriteLine(foo.Bar);

        Console.WriteLine(poop.Bar);

        Console.WriteLine(muh.Bar);

    }

}

​

public struct Foo

{

    public int Bar;

    public Foo(int bar)

    {

        Console.WriteLine("Foo ctor called");

        Bar = bar;

    }

}