Integrate Sage Line 50 with windows application

Question

I have to integrate C# Windows application with Sage Line 50. (To send all invoice details from application to Sage).

I searched on Google and most of the places it says

Answer 1

You need to apply to become a sage developer over at http://www.sage.co.uk/partnering-sage/developers/index.html

Chose an option that suits you best and apply or you can hire a developer that has already paid to become a member to write the code for you (like me lol).