Assembly: WindowsBase (in WindowsBase.dll)
Classes that derive from Freezable should call the method before they attempt to access any members that are not dependency properties. The WritePreamble method should be called before any such members are written to.
This method effectively does nothing more than call VerifyAccess.
Windows Phone 8.1, Windows Phone 8, 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)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.