Creating custom exception in .NET

“Although the .NET framework contains all kinds of exception types which are sufficient in most cases, it can make sense to define custom exceptions in your own applications. They can greatly simplify and improve the error handling and thus increase the overall code quality. Whatever your reasons are for using custom exceptions, this article shows you how to create them and what to pay attention to when it comes to serialization, .NET guidelines and analysis tools.”

Creating Custom Exceptions in .NET