c# - microsoft.office.interop.word を開けません

Question

Word文書を開こうとしていますが、うまくいきません。ドキュメントを保存することしかできません。何が問題なのですか?

 object missing = Missing.Value;
 object start1 = 0;

 var wordApp = new Microsoft.Office.Interop.Word.Application();

 var myDoc = wordApp.Documents.Add(ref missing, ref missing, ref missing, ref missing);

 object doNotSaveChanges = WdSaveOptions.wdDoNotSaveChanges;
 Range rng = myDoc.Range(ref start1, ref missing);

 try
 {
    const char newLine = (char)11;
    myDoc.SaveAs(ref fs,
             ref missing, ref missing, ref missing, ref missing, ref missing,
             ref missing, ref missing, ref missing, ref missing, ref missing,
             ref missing,
             ref missing,
             ref missing, ref missing, ref missing);
     myDoc.Save();

     myDoc.Close(ref doNotSaveChanges, ref missing, ref missing);

     wordApp.Quit(ref doNotSaveChanges, ref missing, ref missing);
     System.Runtime.InteropServices.Marshal.ReleaseComObject(myDoc);   
     System.Runtime.InteropServices.Marshal.ReleaseComObject(wordApp);
    GC.Collect();