DataFormats Class
Provides static, predefined format names for data objects. Use the named constants to identify the format of the data that you request from an IDataObject object.
Namespace: System.Windows
Assembly: System.Windows (in System.Windows.dll)
The DataFormats type exposes the following members.
Silverlight specifies only one data format, DataFormats.FileDrop. This data format is used by the file drop target scenario that is enabled by events on UIElement. For more information, see AllowDrop.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

