static void ReconcileWords(Word._Application app, string inPath1, string inPath2, string outPath)
{
var doc1 = app.Documents.Add(inPath1);
var doc2 = app.Documents.Add(inPath2);
if (new[] { doc1.ProtectionType, doc2.ProtectionType }.Any(pt => pt != Word.WdProtectionType.wdNoProtection))
{
app.Documents.Close(Word.WdSaveOptions.wdDoNotSaveChanges);
return;
}
// CompareDocuments(...) makes an error if either one of the two docs is protected.
app.CompareDocuments(doc1, doc2).SaveAs(outPath);
app.Documents.Close();
}