Getting FB accesstoken from graph API by AppID+Appsecret

Since i cant use facebook c# sdk on my server, i would like to know how to obtain my apps accesstoken. I suppose i need to use the graph 开发者_如何学Capi? I never developed on facebook before, so some help on where to start would be much appreciated! Thanks

According to this answer you can get the application access token like this:

var appAccessToken = "app_id|app_secret";