(help)How to extract the contents of a Range to another word?

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C#

COM

interop

MS-Word

hi,guys

I'd like a word document inside the 25 to 45 the Range, inside which the data is added to another document? The Range There may be pictures or tables, it is not the way a string is added to another document. The following method can meet the requirement, but if the client during the program, use the clipboard, the program to run is not normal:

Application app=new Application();
Document doc1,doc2;
doc1=app.Documents.Open(...);
doc2=app.Documents.Open(...);
doc1.Activate();
object start=25,end=45;
doc1.Range(ref start, ref end).Copy();
doc2.Activate();
start=1;
doc2.Range(ref start, ref start).Paste();