static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
var ac = new AddClass();
long ll = ac.AddLong(1, 2);
MutiplyClass MC = new MutiplyClass();
long l = MC.MultiplyLong(2, 3);
int a = 2;
}