public virtual ObjectResult<CustOrdersDetail_Result> CustOrdersDetail(Nullable<int> orderID)
{
var orderIDParameter = orderID.HasValue ?
new ObjectParameter("OrderID", orderID) :
new ObjectParameter("OrderID", typeof(int));
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<CustOrdersDetail_Result>("CustOrdersDetail", orderIDParameter);
}