Gembox.document License Key |best|

GemBox.Document in your .NET application, you must provide a license key via the ComponentInfo.SetLicense method before using any other members of the library. Available Licensing Modes

Solution:

Always call ComponentInfo.SetLicense() as the very first line of your Main method or application startup. Gembox.document License Key

Common Licensing Errors

Then, optionally, you can set it from code if needed: GemBox

Let’s address the elephant in the room. Every GemBox.Document tutorial starts with this line: GemBox.Document in your .NET application

That’s it. The key is usually a string like "ABCD-1234-EFGH-5678" .