Parses magnet URI into an object.

ParseMagnet.cs

public TorrentMetadata ParseMagnet(string Magnet)
        {
            var MD = new TorrentMetadata();
            MD.URI = Magnet;
            Magnet = Magnet.Replace("magnet:?", "");
            var Parts = Magnet.Split('&');
            foreach (var RawPart in Parts)
            {
                var Part = System.Net.WebUtility.UrlDecode(RawPart);
                if (Part.StartsWith("xt=")) MD.InfoHash = Part.Split(':').Last().ToUpper();
                if (Part.StartsWith("dn=")) MD.DisplayName = Part.Replace("dn=", "");
                if (Part.StartsWith("xl=")) MD.ExactLength = long.Parse(Part.Replace("xl=", ""));
                if (Part.StartsWith("xt=")) AddToArray(ref MD.ExactTopics, Part);
                if (Part.StartsWith("as=")) AddToArray(ref MD.AcceptableSources, Part);
                if (Part.StartsWith("xs=")) AddToArray(ref MD.ExactSources, Part);
                if (Part.StartsWith("kt=")) AddToArray(ref MD.KeywordTopics, Part);
                if (Part.StartsWith("mt=")) AddToArray(ref MD.ManifestTopics, Part);
                if (Part.StartsWith("tr=")) AddToArray(ref MD.Trackers, Part);
            }

            return MD;
        }

        public void AddToArray(ref string[] Array, string Value)
        {
            System.Array.Resize(ref Array, Array.Length + 1);
            Array[Array.Length - 1] = Value.Remove(0, 3);
        }

        public class TorrentMetadata
        {
            public string URI;
            public string InfoHash;
            public string DisplayName;
            public long ExactLength;
            public string[] ExactTopics = new string[0];
            public string[] AcceptableSources = new string[0];
            public string[] ExactSources = new string[0];
            public string[] KeywordTopics = new string[0];
            public string[] ManifestTopics = new string[0];
            public string[] Trackers = new string[0];
        }