static void Main(string[] args)
{
MyDele <int> deleAdd = new MyDele <int>(Add);
int result1 = deleAdd(100, 200);
Console.WriteLine("The result is {0}.", result1);
Console.WriteLine(deleAdd.GetType());
MyDele <double> deleMul = new MyDele <double>(Mul);
double result2 = deleMul(300, 400);
Console.WriteLine($"The result is {result2}.");
Console.WriteLine(deleMul.GetType());
}
static void Main(string[] args)
{
//Console.WriteLine("Hello World!");
//MyDele dele1 = new MyDele(M1);
//dele1 += (new Student()).SayHello ;
//dele1.Invoke();
//dele1();
MyDele dele = new MyDele(Add);
int res = dele(100, 200);
Console.WriteLine(res);
MyDele <int> deleAdd = new MyDele <int>(Add);
int result = deleAdd(100, 200);
MyDele <double> deleMul = new MyDele <double>(Mul);
double mulRes = deleMul(3.0, 4.0);
Console.WriteLine(mulRes);
Console.WriteLine(deleAdd.GetType().IsClass);
//Action<string,string > action = new Action<string,string> (SayHello);
//action("Tim","Mike");
Action <string, int> action = new Action <string, int>(SayHello);
action("Tim", 3);
Func <int, int, int> func = new Func <int, int, int>(Add);
int res2 = func(100, 200);
Console.WriteLine(res2);
//lambda --anonymous,inline method
var func1 = new Func <int, int, int>((a, b) => { return(a + b); });
int res3 = func(100, 200);
func = (x, y) => { return(x * y); };
res3 = func(3, 4);
Console.WriteLine(res3);
DoSomeCalc((a, b) => { return(a * b); }, 100, 200);
}
