Business.SettingsFile.Validate C# (CSharp) Метод

        public string Validate() {
            if (!NaturalGroundingFolder.EndsWith("\\"))
                NaturalGroundingFolder += "\\";
            if (SvpPath.Length == 0)
                EnableSvp = false;
            if (!Path.IsPathRooted(NaturalGroundingFolder))
                return "Invalid Natural Grounding folder";

            if (MediaPlayerApp == MediaPlayerApplication.Mpc) {
                if (!File.Exists(MpcPath))
                    return "Invalid MPC-HC path";
                if (SvpPath.Length > 0 && !File.Exists(SvpPath))
                    return "Invalid SVP path";
            }

            if (MediaPlayerApp == MediaPlayerApplication.Wmp) {
                if (!MediaPlayer.WindowsMediaPlayer.IsWmpInstalled)
                    return "Windows Media Player is not installed";
            }

            return null;
        }