Convert a Word Template with Content Control to HTML file.

Hi,

 

I want to convert a Word Template with complex Content Control(or just a textbox)into a html file which should have those textboxes as such, in C#.

 

I have tried Spire.Doc and Aspose.Words but they just don't create a text box in the html file, its just a span tag. 

Anyone has an idea related to it, please let me know.