fernandostockler 

It is WPF a window that allows customization of the non-client area, has a kiosk mode and has a mechanism for displaying modal content.

ValidatorBuilder constructs a validator object that can be used in a viewmodel to control input via events, such as TextBox.TextChangedEvent, and display compliance with validation rules on every keystroke.... More information

Result is a class that represents the result of an operation. If the operation is successful Result will contain the result of the operation, otherwise it will contain an exception that may or may not be thrown... More information