1:  // Quit self explanatory...

   2:  public class DateSpan

   3:  {

   4:      public int Days { get; set; }

   5:      public int Months { get; set; }

   6:      public int Years { get; set; }

   7:  }

   8:   

   9:  public static DateSpan DateDifference(this DateTime date, DateTime

  10:      dateToCompare)

  11:  {

  12:      // First we calculate total months

  13:      int totalMonths = ((date.Year - dateToCompare.Year) * 12) +

  14:          date.Month - dateToCompare.Month;

  15:   

  16:      int days = 0;

  17:   

  18:      // A month completes on one day before the exact day of the

  19:      // actual date. For example, if starting date is 15-Mar, one 

  20:      // month will complete on 14-Apr regardless of how many days

  21:      // are present in march.

  22:      // So, this is the code to do the same...

  23:      if (date.Day < dateToCompare.Day)

  24:      {

  25:          int day, month, year;

  26:   

  27:          day = dateToCompare.Day;

  28:   

  29:          // If month is jan, switch to dec

  30:          if (date.Month == 1)

  31:          {

  32:              month = 12;

  33:              year = date.Year - 1;

  34:          }

  35:          else

  36:          {

  37:              month = date.Month - 1;

  38:              year = date.Year;

  39:          }

  40:   

  41:          DateTime dateCalculator = new DateTime(year, month, day);

  42:   

  43:          days = (date - dateCalculator).Days;

  44:   

  45:          totalMonths--;

  46:      }

  47:      else

  48:      {

  49:          days = date.Day - dateToCompare.Day;

  50:      }

  51:   

  52:      DateSpan ds = new DateSpan();

  53:      ds.Years = totalMonths / 12;

  54:      ds.Months = totalMonths % 12;

  55:      ds.Days = days;

  56:   

  57:      return ds;

  58:  }