asp.net mvc - Extension method is not working properly -

My app is having some issue. When I keep a debug and check those values ​​update properly. But if it's a Without running debug values ​​correctly.How to get rid of this issue.

This is my stable extension method.

  Public Fixed Decimal CalculateTotal (Invoice Invoice) {var subotto = Invoice. SubTotal; var total = sub-total; If (invoice.fix == tap ||! Invoice fee.a ()) mathematics returns. Round (total, 2); Foreign currency (fees charged in invoicing, where (f => F.Iscelled). Order By (F = & gt; F. Prednens)) {var value = 0m; If (fee.Percentage.HasValue) {If (fee total! = Null) value + = total sum total value; } If (fee.Fixed.HasValue) {value + = fee.Fixed.Value; } Total + = value; } Return Mathematics. Round (total, 2); }   
 The method is called as the top calling down. Public InvoiceDetail Booking (My Parameters) {var bookingProcessModel = BookingProcessDetails (providerKey, ownerKey, serviceId, petKeys, selected date, selected times, selected extras services, selected resources, edit user type, discount, special Value, isProviderPickUp); BookingProcessModel.Invoice.CalculateTotal (); // Here's the method I'm calling Catalog.SaveChanges (); // invoiceDetailModel = GetInvoiceDetailModel (bookingProcessModel.AppointmentModel, bookingProcessModel.Invoice) to save data base; Return invoice mode; }   
 After the above method, the data base saving value is incorrect. But when I put a debug on the above extension method and it's working properly, check it.What's the problem? Any help?   
 
 
 Your extension method assigns a  decimal , but you can do anything Not assigned to ...  
  Booking processModel. Invoice.Collulatetal ();   
 ... is returning a  decimal  value, so what you are looking for is the right behavior.  
 I do not think you need a  extension method for this , then you just type  on  for CalculateTotal  one in your invoice class The method may be the invoice  you pass in.  
 Something like this:  
  var calculatedInvoice = Invoice.CalculateTotal (bookingProcessModel.Invoice);   
  CalculateTotal  will return the new invoice with the values ​​calculated.  
 If you want to stay with the extension method, you will need to assign return value.