ThreadPool threads don't have a message loop. Intended behavior.

You want to use the Enum.Parse static method public static object Parse( Type enumType, string value, bool ignoreCase ); Applying this method to your example goes like this: key = (Keys)Enum.Parse(typeof(Keys), input, true); Don't forget to sanitize the input value.

There's not much you can do. Even totally stupid noob can change their system time, so your best chance is storing a file on a clients machine with some kind of time-mark. Some sorta hidden system file stored somewhere deeeeep containing time-mark acquired from the internets is the best way I can think off right now.

Try .Net Profiler. http://www.microsoft.com/downloads/details.aspx?FamilyID=a362781c-3870-43be-8926-862b40aa0cd0

They may have caught a virus joggling with their system time. .Net BCL wraps the standard Win32 routines for I/O so this error shouldn't really be .Net specific.

And 'sealed' means that the class cannot be inherted/destroys the 'virtuality' of a member variable/method, it has nothing to do with ctor accessibility.

try (returns MethodBase) someModule.ResolveMethod( descriptor );

No. Elaborate.

A rumour has it that it always can be worse :)

Testing if the number is even with modulus is the real horror .. :P