Singleton pattern in a multi-threaded C# application

This is piece of code will assure the creation of a single instance of the singleton class in a multi-threaded application and at the same time highly performing

    public class Singleton
    {
        private static Singleton _instance;
        private static readonly object syncObject = new object();

        public static Singleton instance
        {
            get
            {
                if (_instance == null)
                {
                    lock (syncObject)
                    {
                        if (_instance == null)
                            _instance = new Singleton();
                    }
                }
                return _instance;
            }
        }

    }