C# Singleton pattern with triggerable initialization

Question

I need a singleton that:

• is lazy loaded
• is thread safe
• loads some values at construction
• those values can be queried at any time

Answer 1

You can use double-checked locking pattern. Just add following code in you Singleton class:

public sealed class Singleton
{
   ..........................

        private static object locker = new object();
        private static bool initialized = false;

        public static void Initialize() {
           if (!initialized){ 
             lock(locker) {
                if (!initialized){ 
                  //write initialization logic here
                  initialized = true;
                 }
              }
            }
        }

.......................

}