using System.Text.RegularExpressions;
public static void Main()
var input = "portname (some_code_here!=)";
var unlocode = GetUnlocode(input);
Console.WriteLine(unlocode);
public static string GetUnlocode(string portName)
var pattern = @"\((?<unlocode>[\w\W]+)\)";
var regex = new Regex(pattern);
var match = regex.Match(portName);
if(match.Success) return match.Groups["unlocode"].Value;