public class A
    {
        public int IntValue;
        public string StrValue;
       
        public void ShowMessage()
        {
            Console.WriteLine("IntValue={0},StrValue={1}",IntValue.ToString(),StrValue);

        }
    }

static void Main(string[] args)
        {
            A a = new A { IntValue = 100, StrValue = "Hello World!" };
            a.ShowMessage();
            Console.ReadKey();
        }