ELK/FrameworkLocal/Common/Utilities/Singleton.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Aitex.Core.Util
{
    [Serializable]
    public class Singleton<T> where T : class, new()
    {
        private static volatile T instance;
        private static object locker = new Object();
        public Singleton() { }

        public static T Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (locker)
                    {
                        if (instance == null) instance = new T();
                    }
                }
                return instance;
            }
        }
    } 
}