//public static DaoSingleton Instance
//{
// get
// {
// if (_instance == null)
// {
// lock (key)
// {
// if (_instance == null)
// {
// _instance = new DaoSingleton();
// }
// }
// }
// return _instance;
// }
//}
public static DaoSingleton GetInstance()
{
if (_instance == null)
{
System.Console.WriteLine($"In if(). before lock(). Thread: {Thread.CurrentThread.Name}");
lock (key)
{
System.Console.WriteLine($"In lock(). Before if(). Thread: {Thread.CurrentThread.Name}");
if (_instance == null)
{
System.Console.WriteLine($"In lock() and inside the last if(). Thread: {Thread.CurrentThread.Name}");
_instance = new DaoSingleton();
}
}
}
return(_instance);
}
static void GetThreadsafeSingleton()
{
var singleton = DaoSingleton.GetInstance();
Console.WriteLine($"Thread: {Thread.CurrentThread.Name}\tSingleton: {singleton.GetHashCode()}");
}