Question

I’m using the Facebook C# SDK. How can I get language of the user, so I can display all messages accordingly without forcing the user to choose his preferred language manually?

Answer 1

If you are developing a web app, then you can use Accept-Language Http header to detect the language

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EDIT 1

For winforms application, you can use System.Globalization.CultureInfo.CurrentCulture.Name .

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EDIT2

To get the locale using FB REST API :

dynamic fbResult = new Uri("https://graph.facebook.com/AngelaMerkel?access_token=AAABkECTD......").GetDynamicJsonObject();
Console.WriteLine(
    fbResult.locale ?? "-" + " > " +  //<----
    fbResult.location.country + " " + //<----
    fbResult.location.city + " " + //<----
    fbResult.name + " " + 
    fbResult.gender + " " + 
    fbResult.link + " " + 
    fbResult.updated_time);

You can find info about my extension method GetDynamicJsonObject here