RecoverableException for .NET Framework Solutions

Do you remember the good ol' days before the ApplicationException class in the .NET Framework became "persona non grata"? I sure do. If you were to look at .NET code that I wrote years ago, you'd probably see ApplicationException being used all over the place. After all, this seemed like a great way to differentiate between "expected" errors in your code (e.g. a violation of some business rule)