using System;

​

public class Example

{

   public static void Main()

   {

      DateTime date1 = new DateTime(2018, 05, 03);

      DateTime date2 = new DateTime(2018, 03, 23);

      int result = DateTime.Compare(date1, date2);

      string relationship;

​

      if (result < 0)

         relationship = "i can not book";

      else if (result == 0)

         relationship = "is I can book";         

      else

         relationship = "i can book";

​

      Console.WriteLine("{0} {1} {2}", date1, relationship, date2);

   }

}