Write Preamble Method
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protected: void WritePreamble();
protected void WritePreamble ();
member this.WritePreamble : unit -> unit
Protected Sub WritePreamble ()
Notes to Inheritors
Classes that derive from Freezable should call WritePreamble() before attempting to write to any members that are not dependency properties. If you call WritePreamble() in an API, you can omit a call to ReadPreamble().