Argument `Date1` cannot be converted to type `Date`. App Error Log : - Employee ID : 6636 Action Name : SaveRaiseQualifyingEvent Model : System.Web.Mvc.HandleErrorInfo Controller : UserDetails Web Error Log : at Microsoft.VisualBasic.DateAndTime.DateDiff(String Interval, Object Date1, Object Date2, FirstDayOfWeek DayOfWeek, FirstWeekOfYear WeekOfYear) at WORKTERRA.Shared.Areas.UserDetails.Models.InitiateQualifyingEvent.InitiateQualifyingEventsModel.VerifyRaisedQualifyingEventForDate(RaisedQualifyingEvent objRaiseQualifyingEvent) in d:\WT\branches\LB\Web\Web Projects\WORKTERRA\Areas\UserDetails\Models\QualifyingEvent\InitiateQualifyingEventsModel.cs:line 158 at WORKTERRA.Shared.Areas.UserDetails.Models.InitiateQualifyingEvent.InitiateQualifyingEventsModel.SaveRaiseQualifyingEvent(List`1 obj, Boolean IsPopup) in d:\WT\branches\LB\Web\Web Projects\WORKTERRA\Areas\UserDetails\Models\QualifyingEvent\InitiateQualifyingEventsModel.cs:line 217 at WORKTERRA.Shared.Areas.UserDetails.Controllers.UserDetailsController.SaveRaiseQualifyingEvent(String QualifyingEventList, String IsPopup) in d:\WT\branches\LB\Web\Web Projects\WORKTERRA\Areas\UserDetails\Controllers\QualifyingEvent\InitiateQualifyingEventController.cs:line 66 at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass13.b__10() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)