Finds the installation directory of CS:GO

GetCSGODir.cs

        private string GetCSGODir()
        {
            string steamPath = (string)Registry.GetValue("HKEY_CURRENT_USER\\Software\\Valve\\Steam", "SteamPath", "");

            string pathsFile = Path.Combine(steamPath, "steamapps", "libraryfolders.vdf");

            if (!File.Exists(pathsFile))
                return null;

            List<string> libraries = new List<string>();
            libraries.Add(Path.Combine(steamPath));

            var pathVDF = File.ReadAllLines(pathsFile);


            // Okay, this is not a full vdf-parser, but it seems to work pretty much, since the 
            // vdf-grammar is pretty easy. Hopefully it never breaks. I'm too lazy to write a full vdf-parser though. 
            Regex pathRegex = new Regex(@"\""(([^\""]*):\\([^\""]*))\""");
            foreach (var line in pathVDF)
            {
                if(pathRegex.IsMatch(line))
                {
                    string match = pathRegex.Matches(line)[0].Groups[1].Value;

                    // De-Escape vdf. 
                    libraries.Add(match.Replace("\\\\", "\\"));
                }
            }

            foreach(var library in libraries)
            {
                string csgoPath = Path.Combine(library, "steamapps\\common\\Counter-Strike Global Offensive\\csgo");
                if (!Directory.Exists(csgoPath))
                {
                    return csgoPath;
                }
            }


            return null;
        }