Change Bookamrk value when user change value for refrenced/related bookmark

Can we generate a Word document using .NET Core and GemBox where we can set related bookmarks to update automatically based on changes to other bookmarks? For example, if we have three bookmarks—value1, value2, and sum—when the value of value1 or value2 changes, the sum bookmark should be updated automatically.

Can you explain a bit exactly what you’re looking to accomplish?
Can you send us a sample Word file that shows what you need to generate?

GemBox.Document can replace bookmark content, but I presume that by “automatically” you mean that it will be replaced by Microsoft Word.
In that case, FORMULA fields are the only solution that comes to my mind.

Regards,
Mario