MailKit.Net.Imap.ImapClient.UnescapeUserName C# (CSharp) Method

		static string UnescapeUserName (string escaped)
		{
			StringBuilder userName;
			int startIndex, index;

			if ((index = escaped.IndexOf ('%')) == -1)
				return escaped;

			userName = new StringBuilder ();
			startIndex = 0;

			do {
				userName.Append (escaped, startIndex, index - startIndex);
				userName.Append (HexUnescape (escaped, ref index));
				startIndex = index;

				if (startIndex >= escaped.Length)
					break;

				index = escaped.IndexOf ('%', startIndex);
			} while (index != -1);

			if (index == -1)
				userName.Append (escaped, startIndex, escaped.Length - startIndex);

			return userName.ToString ();
		}