System.UriTemplate.ParseQueryTemplate C# (CSharp) Method

		void ParseQueryTemplate (string template, int index, int end)
		{
			// template starts with '?'
			string [] parameters = template.Substring (index + 1, end - index - 1).Split ('&');
			List<string> list = null;
			foreach (string parameter in parameters) {
				string [] pair = parameter.Split ('=');
				if (pair.Length != 2)
					throw new FormatException ("Invalid URI query string format");
				string pname = pair [0];
				string pvalue = pair [1];
				if (pvalue.Length >= 2 && pvalue [0] == '{' && pvalue [pvalue.Length - 1] == '}') {
					string ptemplate = pvalue.Substring (1, pvalue.Length - 2).ToUpper (CultureInfo.InvariantCulture);
					query_params.Add (pname, ptemplate);
					if (list == null)
						list = new List<string> ();
					if (list.Contains (ptemplate) || (path != null && path.Contains (ptemplate)))
						throw new InvalidOperationException (String.Format ("The URI template string contains duplicate template item {{'{0}'}}", pvalue));
					list.Add (ptemplate);
				}
			}
			query = list != null ? new ReadOnlyCollection<string> (list.ToArray ()) : empty_strings;
		}
	}