internal void FeedDataDiagramColorsPart(DiagramColorsPart NewPart, DiagramColorsPart ExistingPart)
 {
     using (StreamReader sr = new StreamReader(ExistingPart.GetStream()))
     {
         using (StreamWriter sw = new StreamWriter(NewPart.GetStream(FileMode.Create)))
         {
             sw.Write(sr.ReadToEnd());
         }
     }
 }