Here, have some fish:
string value = "Wed Mar 12 2014 17:50:15 GMT+0000 (UTC)";
value = value.Replace("GMT","").Replace("(UTC)","").Trim();
value = value.Insert(value.Length - 2, ":");
DateTime parsed = DateTime.ParseExact(value, "ddd MMM dd yyyy HH:mm:ss zzz",
CultureInfo.InvariantCulture);