Best way to create IPEndpoint from string

Question

Since IPEndpoint contains a ToString() method that outputs:

10.10.10.10:1010

There should also be

Answer 1

using System;
using System.Net;

static class Helper {
  public static IPEndPoint ToIPEndPoint(this string value, int port = IPEndPoint.MinPort) {
    if (string.IsNullOrEmpty(value) || ! IPAddress.TryParse(value, out var address)) 
      return null;
    var offset = (value = value.Replace(address.ToString(), string.Empty)).LastIndexOf(':');
    if (offset >= 0)
      if (! int.TryParse(value.Substring(offset + 1), out port) || port < IPEndPoint.MinPort || port > IPEndPoint.MaxPort)
        return null;
    return new IPEndPoint(address, port);
  }
}

class Program {
  static void Main() {
    foreach (var sample in new [] {
      // See https://docops.ca.com/ca-data-protection-15/en/implementing/platform-deployment/technical-information/ipv6-address-and-port-formats
      "192.168.0.3",
      "fe80::214:c2ff:fec8:c920",
      "10.0.1.53-10.0.1.80",
      "10.0",
      "10/7",
      "2001:0db8:85a3/48",
      "192.168.0.5:10",
      "[fe80::e828:209d:20e:c0ae]:375",
      ":137-139",
      "192.168:1024-65535",
      "[fe80::]-[fe81::]:80"
    }) {
      var point = sample.ToIPEndPoint();
      var report = point == null ? "NULL" : $@"IPEndPoint {{
  Address: {point.Address}
  AddressFamily: {point.AddressFamily}
  Port: {point.Port}
}}";
      Console.WriteLine($@"""{sample}"" to IPEndPoint is {report}
");
    }
  }
}