I have created Helper file that is not accessible from App_Code folder and also HtmlHelper is getting null while running. It was resolved by get helpers from the PageContext
We can use metadata to add functionality to entities by adding properties in a metadata class with attributes that we can affect the behavior of entities implemented with partial class called metadata classes.
You should make sure that the file path passing to delete from the server in asp.net c#. This following code is to delete the record from database and also from the folder path of the server.