How to setup .SLN

how to setup and does file have to be .sln?

Hello @kmunas
This is the extension for visual basic studio files u need the softwatre to open

hello what software?

visual basic studio community

It’s called visual studio community and no, to install OB2 you don’t have to open the .sln file. Please follow the installation guide on this forum

where i can find installation tutorial on this forum?