public static Single_A CreateInstance()
{
//双重if加lock模式
if (single == null)
{
lock (_lock)
{
if (single == null)
{
single = new Single_A();
}
}
}
return(single);
}
static void Main(string[] args)
{
//SingleDesign :单例模式 ,内存中只实例化一次
for (int i = 0; i < 10; i++)
{
Task.Run(() =>
{
Single_A single_A = Single_A.CreateInstance();
Single_B single_B = Single_B.CreateInstance();
Single_C single_C = Single_C.CreateInstance();
single_A.Show();
single_B.Show();
single_C.Show();
});
}
Console.ReadKey();
}
