title: Is there any free library to covert doc to pdf without using Microsoft.Office.Interop.Word in c# environment
body: <p>I meet a problem about how to using c# without using Microsoft.Office.Interop.Word to covert doc to pdf. I have tried some third party solution, like spire.Doc, but they are not free, and also I found DocX_Doc in nuget, but it seems there is no tutorial about that.Is anyone knows a free solution for this problem, or any instruction about DocX_Doc. Thanks a lot.</p>