public static void Main()
p.MyPrint("mohamed"," Goumih");
p.MyPrint("a" ,"b" ,"c");
System.Console.WriteLine("Hello World");
void MyPrint(string s1, string s2)
System.Console.WriteLine(s1 + s2);
void MyPrint(params string[] s)
System.Console.WriteLine(x);
void MySum(int i, int j = 0, int k = 0)
System.Console.WriteLine(1*i + 2*j + 3*k);