Get Leave Days with out holidays & Week Days Using Sharepoint 2010 Event Receivers

Question

public override void ItemAdding(SPItemEventProperties properties)

       {

           if (properties.ListTitle!="Contractor Attendance")

           {

               properties.Cancel = true;

           }

           else

           {

               DateTime Fdate = Convert.ToDateTime(properties.AfterProperties["From_x0020_Date"]).AddDays(1);

               DateTime Tdate = Convert.ToDateTime(properties.AfterProperties["To_x0020_Date"]).AddDays(1);

               TimeSpan ts = Tdate.Subtract(Fdate);

               int days = Convert.ToInt32(ts.Days) + 1;

               for (var day = Fdate.Date; day.Date <= Tdate.Date; day = day.AddDays(1))

               {

                   if (day.DayOfWeek == DayOfWeek.Saturday || day.DayOfWeek == DayOfWeek.Sunday)

                   {

                       days--;

                   }

               }

               SPWeb myweb = properties.OpenWeb();
                myweb.AllowUnsafeUpdates = true;


                SPList mylist = myweb.Lists["Holidays List"];
                    SPListItemCollection lic = mylist.Items;
                    foreach (SPListItem item in mylist.Items)
                    {
                        DateTime Hdate = Convert.ToDateTime(item["Date"]);

                        for (var day = Fdate.Date; day.Date <= Tdate.Date; day = day.AddDays(1))
                        {
                            if (day == Hdate)
                            {
                                days--;
                            }
                        }

                    }

            

               properties.AfterProperties["Days"] = Convert.ToInt32(days);

           }

          

       }