Senthil Kumar found out another interesting bit of C# trivia: apparently C# does not do compile-time type safetly checks for interface casts! C# is usually very strict in the kind of stuff it allows you to do (unless you use objects all the time, in which case you deserve to die anyway). This has to be one of the very few cases I've found C++ (as a language) to be superiour to C# - I prefer simplicity and strictness, and while C# certainly provides the former, C++ evidently provides better compile-time checks.