C-sharp : Error handling: catching NullReferenceException

Catch exceptions of NullReferenceException type is usually considered to be a bad practice.

Catch NullReferenceException usually occurs in one of three cases:

1. There was a null pointer dereference. The developer decided that it is easier to catch an exception than to solve the problem that caused it.
2. Application deliberately throws NullReferenceException to report an error.
3. NullReferenceException catcher is part of the mechanism of testing, in which the application is given incorrect data as an input.

Catching NullReferenceException is acceptable only in the latter case.