Gets or sets the Content-type HTTP header.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: Not mapped to an xmlns.
Note that the pack URI protocol does not process information in the request other than the uniform resource identifier (URI). For most purposes (such as determining the type of POST information), there is no use for this property.
returns an empty string if the request resolves from the PackageStore cache.