using System;

using System.Collections.Generic;

using System.Text.RegularExpressions;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var response = @"IP Address, IP_ID, HostName, FirmwareName

172.21.7.211 :  0 : DEV-AM-200 : AM-200 [v1.3975.00025 (February 14 2019), #FFFFFFFF] @E-00107f9be7c5

172.21.7.52 :  0 : MA-CP3 : CP3 [v1.503.3568.26236 (Oct 09 2018), #00AEC621] @E-00107f526810

172.21.7.207 :  0 : DEVLIGHTING : RMC3 [v1.504.3687.32251 (Feb 05 2019), #00ED0725] @E-00107f87c377

172.21.7.208 :  0 : OFFICE-DMPS3 : DMPS3-300-C [v1.502.3081.24394 (Jun 09 2017), #00F2E861] @E-00107f89ca44

172.21.7.67 :  0 : DM-MD8x8-00107F7E5C11 : DM-MD8x8 Cntrl Eng [v4.102.352400038 (Dec 13 2017), #00EC0E71]

172.21.7.212 :  7 : TS-1542-00107F9C4DDB : TS-1542 [v1.3781.00029 (March 07 2019), #01414012] @E-00107f9c4ddb

";      

        ProcessResponse(response);      

    }

    private static void ProcessResponse(string response_) { 

        var devices = new List<Device>();   

        devices = ParseTable(response_);

        foreach(var device in devices) {

            Console.WriteLine(device.IpAddress);

            Console.WriteLine(device.IpId);

            Console.WriteLine(device.HostName);             

            Console.WriteLine(device.Firmware);         

        }       

    }

​

    private static List<Device> ParseTable(string table_) {

            var devices = new List<Device>();

​

            var matchCollection = Regex.Matches(table_,

                                                @"(?:\s{4,5})(?<ipAddress>.)(?:\s{1,5})(?<ipId>.+?)(?:\s{1,4})(?<hostName>.+?)(?:\s{1,10})(?<firmware>.*)",

                                                RegexOptions.Multiline);

            if (matchCollection.Count <= 0) {

                return devices;

            }

            foreach (var match in matchCollection.Cast<Match>().Where(match_ => match_.Success)) {

                devices.Add(new Device() {

                    IpAddress = match.Groups["ipAddress"].Value ?? string.Empty,

                    IpId = match.Groups["ipId"].Value ?? string.Empty,

                    HostName = match.Groups["hostName"].Value ?? string.Empty,

                    Firmware = match.Groups["firmware"].Value ?? string.Empty,

                });

            }

​

            return devices;

        }

}

​

    public class Device {

        public string IpAddress { get; set; }

        public string IpId { get; set; }

        public string HostName { get; set; }

        public string Firmware { get; set; }    

    }