The Windows Forms OpenFileDialog component is a pre-configured dialog box. It is the same Open File dialog box exposed by the Windows operating system. It inherits from the CommonDialog class.
Introduces the general concepts of the OpenFileDialog component, which allows you to display a pre-configured dialog box that users can use to open files.
Explains how to open a file at run time via an instance of the OpenFileDialog component.
Provides reference information on the OpenFileDialog class and its members.
Describes a set of controls and components that allow users to perform standard interactions with the application or system.
Provides a complete list of Windows Forms controls, with links to information on their use.
Discusses the Windows Forms dialog box controls and components and the code necessary for executing their basic functions. (MSDN Online Library technical article)