Convert language abbreviation to full name, e.g. en to English?

quick question, what's the best way to convert language a abbreviation to full name? e.g. en to Engli开发者_开发问答sh? Note, it's not en-US, it's just en, fr, de

C# please.

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I'm not sure you can get it from just en... You can do this though if you know the rest of the abbrevation:

System.Globalization.RegionInfo info = new System.Globalization.RegionInfo("en-GB");
string countryName = info.EnglishName;

Edit: Actually, you can do it:

CultureInfo info = new CultureInfo("en");
string englishName = info.EnglishName;

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        System.Globalization.CultureInfo x = new CultureInfo("en");
        string name = x.EnglishName;