Hi,
Thanks for your inquiry.
Note free Spire.Doc and commercial Spire.PDF cannot be used in one project. And there is no way to mix them.
As for your case, please download our commercial
Spire.Office Platinum (DLL Only) Version:4.7.0, then reference the corresponding dlls(Spire.License.dll, Spire.Pdf.dll, Spire.Doc.dll) in your project. If you want to remove the warning information generated by Spire.Doc, you need to purchase Spire.Doc. Then
apply the two licenses in your project.
Sincerely,
Betsy
E-iceblue support team