ReSharper: how to remove “Possible 'System.NullReferenceException'” warning

Question

Here is a piece of code:

IUser user = managerUser.GetUserById(UserId);
if ( user==null ) 
    throw new Exception(...);

Quote quote = new Quote(user.FullNam         


        

Answer 1

This is caused by the Resharper engine. These "possible NullReferenceException" happen because someone (probably at Resharper) has declared/configured somewhere an annotation on the method.

Here is how it works: ReSharper NullReferenceException Analysis and Its Contracts

Unfortunately, sometimes, these useful annotation are just wrong.

When you detect an error, you should report it to JetBrains and they will update the annotations on the next release. They're used to this.

Meanwhile, you can try to fix it by yourself. Read the article for more :)