• Source 
    1. using System;
    2.  
    3. public class Test
    4. {
    5. 	public static void Main()
    6. 	{
    7. 		// your code goes here
    8. 		var a = 6.55;
    9.  
    10. 		var dt = DateTime.FromOADate(a*365);
    11.  
    12. 		var year = Math.Floor(a);
    13.  
    14. 		var month = Math.Floor((a - year) * 12);
    15.  
    16. 		Console.WriteLine("{0} year {1} month", dt.Year - 1900, dt.Month);
    17. 		Console.WriteLine("{0} year {1} month", year, month);
    18. 	}
    19. }