At present, my requirement is very simple, which is to use aspose cad to open DWG drawing file, modify part of the text content, and finally output according to the original DWG format, but it seems that you only support the output of PDF format and some picture formats.
I have observed your requirement and regret to share that at present the support for saving DWG file is not available in API. An issue with ID CADNET-341 has already been created in our issue tracking system to provide the support. This thread has been linked with the issue so that you may be notified once the support will be available.