true if the UniBlob stream can be written; false if a UniBlob is closed, disposed or Null.
Remarks
Use this property to determine whether you can write to the instance of UniBlob class.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2