public SvgDropFlags DestinationDropFlags { get; set; }
A value that indicates which element types from the destination document to drop (ignore) when merging. The default value is SvgDropFlags.None, which means no elements are dropped.
Use this value to drop (ignore) element types in the destination document when merging. For example, to ignore all of the image elements from the destination document from the resulting SVG, add SvgDropFlags.Images to this value.
When calling SvgDocument.MergeWith, the source document is the SVG document passed to the method and the destination document is the object itself.