private void PrintC()
{
MyActionA <int> a = (arg) => { Console.WriteLine("第一个：{0} ", arg); };
a += (arg) => { Console.WriteLine("第二个：{0} ", arg); };
a += (arg) => { Console.WriteLine("第三个：{0} ", arg); };
a += (arg) => { Console.WriteLine("第四个：{0} ", arg); };
a += PrintA;
a(1);
a.GetInvocationList();
}
private void PrintAct()
{
MyActionA <int> a = PrintA;
MyActionA <int> b = pa => Console.WriteLine("{0}", pa);
//匿名委托
MyActionA <string> c = delegate(string aa) { Console.WriteLine("{0}", aa); };
a(1);
b(2);
c("anonymous Act");
MyActionA <int> d = PrintA;
d += delegate(int pb) { Console.WriteLine("anonymous 2：{0}", pb); };
d(2);
}