After I save document (object Document open myfile.docx and save it as myfileEdited) Document.SaveAs("myfileEdited.docx"); or I use Close(); when I call
using (WordprocessingDocument Document2 = WordprocessingDocument.Open("myfileEdited.docx", true))
{
// ...
}it crash here and I got message
"Unhandled Exception: System.IO.IOException: The process cannot access the file 'path to file' because it is being used by another process."