Gets or sets the Content-length HTTP header.
Assembly: PresentationCore (in PresentationCore.dll)
Note that the pack URI protocol does not process information in the request other than the uniform resource identifier (URI). For most traditional purposes (such as estimating the size of POST information), there is no need for this property.
returns 0 if the request resolves from the PackageStore cache.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)