A validation code—also known as a CVV, CV2, or CVV2 code—is a series of three or four numbers located on the front or back of a credit card. It is intended to provide an additional layer of ...

To protect its products and software, Microsoft strictly regulates the sale and use of Windows software by embedding a validation code, also called a product key, in every copy of Windows.

Here's how you can integrate validation code into both the entities the Entity Framework generates and the ones you write. You tell your client that you have an application with a one-second response ...

While you can create classes that contain their own validation code, there are scenarios where it makes sense to separate validation code from the properties it validates using DataAnnotations. In a ...