Singleton pattern realisation

This is the correct implementation of the Singleton design pattern. It is easier to not have the lazy-initialization option, but if you have to then go on with the following example.

And here is it's implementation on C#.

public class SingletonTest

{

  private static SingletonTest instance;

  private static readonly Object syncRoot = new Object();

 

  private SingletonTest ()

  {

  }

  public static SingletonTest Instance

  {

    get

    {

      if (instnace == null)

      {

        lock (syncRoot)

        {

          if (instance == null)

          {

            instance = new SingletonTest();

          }

        }

      }

     

      return instance;

    }

  }

}