'Declaration

Public ReadOnly Property HasBitmapData As Boolean

public bool HasBitmapData { get; }

public: __property bool get_HasBitmapData();

public:
property bool HasBitmapData {
   bool get();
}

true - image has bitmap as a source, image data are stored in memory; false - image has file or stream as a source, image data are decoded from the source when this is necessary.