Singleton Pattern Code Review

class Program { static void Main(string[] args) { Console.WriteLine("Getting singleton 1."); Singleton instance1 = Singleton.getInstance(); instance1.Item = "Hello World!"; Console.WriteLine(String.Format("Got singleton 1 {0}.", instance1));
Console.WriteLine("\nGetting singleton 2."); Singleton instance2 = Singleton.getInstance(); instance2.Item = "Foo"; Console.WriteLine(String.Format("Got singleton 2 {0}.", instance1));
if (instance1 == instance2) { Console.WriteLine("\nInstance 1 and Instance 2 are equal"); } Console.WriteLine(String.Format("Instance 1, Item = {0}.", instance1.Item)); Console.WriteLine(String.Format("Instance 2, Item = {0}.", instance2.Item));
Console.Read(); } }