• System.Object
  • Base class for each and every type
  • Single base class makes framework consistent
• The not-so-primitive "primitive" types
  • Full-featured classes, rich functionality
  • Still exposed as language-intrinsic types
    • C#: bool, int, long, string, double, float
• System console support
  • Writing to the console/ Reading from the console
• Standard interfaces
  • IFormattable: Provides functionality to format the value of an object
    • Format method: Formats the value of the current instance as specified.
  • IDisposable: Provides explicit control of releasing resources

http://msdn.microsoft.com/netframework/