Hi,

hardcore route is just instantiate DateTime with first date and then second
datetime with the end date. Then loop while adding AddDays(1) to the loop
date until you're at the end date. In the loop then just add one to every
day "counter"

It could be something like (not tested)

DateTime startDate = new DateTime(2007,1,1);
           DateTime loopDate = startDate;
           DateTime endDate = new DateTime(2007, 12, 31);

           int mondays = 0;

           do
           {
               if(loopDate.DayOfWeek == DayOfWeek.Monday)
                   mondays += 1;

                  loopDate=loopDate.AddDays(1);
           }
           while (loopDate <= endDate);

           //What does mondays variable contain at this point?

You need a little bit of brute force, but its easy enough.

Quick and dirty works well for this

   DateTime fromDate = Convert.ToDateTime("1/01/2007");
   DateTime toDate = Convert.ToDateTime("09/01/2007");
   DateTime oNewDate;
   int dayCount = toDate.Subtract(fromDate).Days;
   Response.Write("Days " + dayCount + "<br>");
   int i = 0;
   int mon =0, tue=0, wed=0, thu=0, fri=0, sat=0, sun = 0;
   while (i < dayCount){
       oNewDate = fromDate.AddDays(i);
       if (oNewDate.DayOfWeek == DayOfWeek.Monday) {mon += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Tuesday){ tue += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Wednesday){wed += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Thursday){thu += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Friday){fri += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Saturday){sat += 1;}
       if (oNewDate.DayOfWeek == DayOfWeek.Sunday){sun += 1;}
       i++;
   }
   Response.Write("There are " + mon.ToString() + " Mondays");
   Response.Write("There are " + sun.ToString() + " Sundays");

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog