/// <summary>
		/// Extracts the root domain
		/// </summary>
		/// <author>james_symon@hotmail.com</author>
		public static string GetRootDomain(string url)
		{
			var extensions = new[] { ".co.uk", ".com", ".net", ".org" };//valid domain extensions
			if (url.IndexOf("//") > -1)
				url = url.Substring(url.IndexOf("//") + 2);//remove 'http://', 'https://', 'ftp://' etc etc.
			if (url.IndexOf("/") > 2)
				url = url.Substring(0, url.IndexOf("/")); //remove '/subdir' from 'www.test.com/subdir'
			for (int i = url.Length; i > 0; i--)//work backwards
			{
				var possibleExtension = url.Substring(i);
				if (extensions.Any(a => a.Equals(possibleExtension)))
				{
					var extension = possibleExtension;
					var remainingUrl = url.Substring(0, i);
					var remainingUrlSections = remainingUrl.Split(new char[] { '.', '/' }, StringSplitOptions.RemoveEmptyEntries);
					if (remainingUrlSections.Length > 0)
					{
						url = remainingUrlSections[remainingUrlSections.Length - 1] + extension;
						break;
					}
				}
				
			}
			return url;
		}