public class Singleton
    {
       public readonly static Singleton instance = null;
       private static object objectLock = new object();
       public int Age
       {
           get;set;
       }
       public static Singleton Instance
       {
           get
           {
               if (instance == null)
               {
                   lock (objectLock)
                   {
                       if (instance == null)
                           instance = new Singleton();
                   }
               }
               return instance;
           }
       }private Singleton()
       {
           TriggerException t = new TriggerException();
           t.ComplicatedCalculate();
       }
}