WPF:

WPF development supports three kinds of application:

1)Windows applications

2) Navigation applications

3) XAML Browser Applications (XBAPs)

Windows applications

Windows applications are
the most similar to Windows Forms applications. Windows applications are

Microsoft Windows–driven and provide a user experience that is familiar to Windows

users and developers. Multiple windows can be open at any given time, and

there is no built-in sense of navigation or history.

Navigation applications

Navigation applications provide a page-based user experience, similar to the experience

of using a Web site. Typically, only a single page can be open at any given time,

and the journal functionality keeps a record of pages visited and allows back-andforth

navigation. Unlike a Web site, however, a Navigation application is a compiled

application that runs on your desktop computer and, like a Windows application, has

full access to the resources of your computer.

XBAP

XBAPs are similar to Navigation applications, but they are designed to run in

Windows Internet Explorer. These applications can be deployed to a server or to a Web

site and are downloaded when instantiated. Applications of this type do not have full

access to a computer’s resources. XBAPs run under a partial-trust environment, and

resources such as the file system and the registry are inaccessible by XBAPs.