private void CreateNewRequest()
        {
            TimeHolidayUsers.Insert(NewTimeHolidayUser);
            int UserId = NewTimeHolidayUser.RefUserId;

            NewTimeHolidayUser.ValueChanged -= NewTimeHolidayUser_ValueChanged;
            NewTimeHolidayUser = new TimeHolidayUser
            {
                RefUserId = UserId
            };
            NewTimeHolidayUser.ValueChanged += NewTimeHolidayUser_ValueChanged;
            CalculateDays();
        }
 private void GetData()
 {
     HolidayUserList     = TimeHolidayUsers.GetAll().ToSvenTechCollection();
     UserList            = Users.GetAll().ToSvenTechCollection();
     TimeHolidayTypeList = TimeHolidayTypes.GetAll().ToSvenTechCollection();
 }