C#单例模式

单例模式

简单实现

public MySingleton
{
  private MySingleton(){}	// 构造函数私有化
  public readonly static MySingletonInstance = new MySingleton();	// 手动实例化
}

如果线程安全的话

public class MySingleton
{
    private static MySingleton _instance = null;
    private static readonly object SyncObject = new object();
    MySingleton() { }
    public static MySingleton Instance
    {
        get
        {
            if (null == _instance) 
            {
                lock (SyncObject) //双重检查，可以减少同步带来的性能开销
                {
                    if (null == _instance)
                    {
                        _instance = new MySingleton();
                    }
                }
            }
            return _instance;
        }
    }
}