Debug - Trace - Generic Class - Isolated Storage - Thread Pool - Monitor - Lock - Mutex - Timer
Design Patterns - Singleton - Decorator - Observer - Fecade - Factory - Multi Threading
BitConverter - BinaryFormatter - List Dictionary - Hash Table - Hybrid Dictionary - Unit Test
StreamReader - StreamWriter - TextReader - TextWriter - GZipStream-InterpolatedStrings-DeflateStream
Queue - Stack - LinkedList - ReadOnlyCollection-Dictionary-SortedList-Yield - Regular Expression-FileInfo - FileAttributes