How to may ways to handle exception in Entity Framework

Exceptions provide a way to transfer control from one part of a program to another. C# exception handling is built upon four keywords: try, catch, finally, and throw. try − A try block identifies a block of code for which particular exceptions is activated. It is followed by one or more catch blocks.

 

check the link below. 

https://www.tutorialspoint.com/csharp/csharp_exception_handling.htm 

You can user Try-Catch

 

try{

//your code 

} 

catch(Exception ex){

throw; 

}