Bending the language to my will in the name of science, with presumably horrific consequences.

jon_skeet_exercise.cs

using System;
using var = TestBed.MyClass;

namespace TestBed
{
    public class MyClass
	{
		public static implicit operator MyClass(int me)
		{
			return null;
		}

		public static implicit operator MyClass(string me)
		{
			return null;
		}
	}

	public class VarTest
	{
		public static void Main()
		{
			var x = 10;
			x = "hello";
			Console.WriteLine(x == null);
		}
	}
}