Combining strings and distincting them, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var pt2 = "{1387A225-0429-47EB-901C-2DDFC249E69A}|{53FD448A-3A8C-41A8-A52A-C1E2CEBC1140}|{E565D764-7C33-4BE6-BB9E-6A7796D90C13}|{B9CDF65E-7ACB-4769-B64D-EA662922A4E2}|{1C7B4267-413A-44C1-B0C4-4A0803781561}|{752DD99A-6C80-4A0E-8EB2-ED90B17BBDA5}|{2C2D6703-D3F0-4242-B016-7D34ABE065D7}|{FE6A0965-1E25-46EA-8390-B4D13A666A99}|{EAF4026F-0C63-4A10-AD44-3B5DEE41B47A}|{4650388D-0825-4F40-91CE-9E30791D60F9}|{15D62A1B-2F4E-4225-9BD9-AAE35D9561B4}|{F2AA62E8-E2A0-400D-890C-E57F27B0A6BB}|{ACBD3AB7-3DEC-4CDE-AEF5-1706F3D3454D}|{C67C25FA-F85B-4937-8397-D1F9E2E9BBA4}|{601E08D2-586C-4620-9555-315A47EA8364}|{0BBA6D75-5D35-4405-BC16-853F3DB2639B}|{D31BD63B-94C3-4217-9347-09836A716023}|{3B69E74D-37D6-4320-AFF4-FBE2DB8A97A2}|{35F0B4D2-5197-402D-ABF3-F26FA08EC61C}|{89F94535-26CD-483D-9D5E-1D427773B914}|{EB7DD5D5-EC44-4A06-8124-5DABE66BDC98}|{C077584C-4429-4091-B59A-1A46DD03056B}|{991E63BA-A4B5-4F11-9AAD-CF4F4A310F75}";
            var pt10 = "{1387A225-0429-47EB-901C-2DDFC249E69A}|{53FD448A-3A8C-41A8-A52A-C1E2CEBC1140}|{E565D764-7C33-4BE6-BB9E-6A7796D90C13}|{B9CDF65E-7ACB-4769-B64D-EA662922A4E2}|{1C7B4267-413A-44C1-B0C4-4A0803781561}|{752DD99A-6C80-4A0E-8EB2-ED90B17BBDA5}|{2C2D6703-D3F0-4242-B016-7D34ABE065D7}|{EAF4026F-0C63-4A10-AD44-3B5DEE41B47A}|{4650388D-0825-4F40-91CE-9E30791D60F9}|{F2AA62E8-E2A0-400D-890C-E57F27B0A6BB}|{3B69E74D-37D6-4320-AFF4-FBE2DB8A97A2}|{ACBD3AB7-3DEC-4CDE-AEF5-1706F3D3454D}|{C67C25FA-F85B-4937-8397-D1F9E2E9BBA4}|{35F0B4D2-5197-402D-ABF3-F26FA08EC61C}|{89F94535-26CD-483D-9D5E-1D427773B914}|{EB7DD5D5-EC44-4A06-8124-5DABE66BDC98}|{601E08D2-586C-4620-9555-315A47EA8364}|{C077584C-4429-4091-B59A-1A46DD03056B}|{0BBA6D75-5D35-4405-BC16-853F3DB2639B}|{991E63BA-A4B5-4F11-9AAD-CF4F4A310F75}";
            
            PrintCombo(pt2, pt10);
            
            var pt2InsertOptions = "{F351021E-A6E9-423F-B727-5EB36E8C5DA1}|{90232B3C-FB43-4930-9C5B-C1F1C0EFD31F}|{2825AD17-8CF2-44F4-9B92-EB048726A406}|{029B20D3-6CBD-4D5A-B0B9-533B5189711E}|{2C0A09B1-642E-49DB-AE57-FD3A77EF3FBA}|{E8B4333F-2D8F-40E8-AF08-9F4EA1E89827}|{CB31FB8E-8395-460A-ACDF-73D37A279702}|{AEDDF214-62F1-413B-BC47-DD20F02354C9}|{6140CA83-87A0-44FB-A7A6-0F4B742DF881}|{2447E05A-6874-4DB9-A6DB-377F62AD6F0B}|{ADE181CC-C078-4F50-803C-725F4B990553}|{11274919-41E1-4C5F-A819-60F7039A51A9}|{E5158864-AA3D-45E0-A360-7FEC13CCA9C6}|{217AE36F-6CA4-4F05-8659-83A25654641F}|{43656747-934C-4329-8947-865BE437C55F}|{883B134E-2450-45BF-8C2C-7BE584AC1828}|{E529FCC5-E621-477E-9E50-D9044A060FDA}";
            var pt10InsertOptions = "{F351021E-A6E9-423F-B727-5EB36E8C5DA1}|{E8B4333F-2D8F-40E8-AF08-9F4EA1E89827}|{8578F415-B062-4947-BB2B-1C3A02235084}|{E8D7E4DF-7CFD-43BF-896D-D3741C396B77}|{CB31FB8E-8395-460A-ACDF-73D37A279702}|{06624DA1-A62D-4B52-BBE3-2E04BD704425}|{58D66A1C-0F8C-443A-AAA2-24395956DBE9}|{6140CA83-87A0-44FB-A7A6-0F4B742DF881}|{2447E05A-6874-4DB9-A6DB-377F62AD6F0B}|{ADE181CC-C078-4F50-803C-725F4B990553}|{43656747-934C-4329-8947-865BE437C55F}|{883B134E-2450-45BF-8C2C-7BE584AC1828}|{E529FCC5-E621-477E-9E50-D9044A060FDA}";
            
            PrintCombo(pt2InsertOptions, pt10InsertOptions);
        }
        
        private static void PrintCombo(string part1, string part2)
        {
            
            var idList = part1.Split('|').ToList();
            idList.AddRange(part2.Split('|'));
            idList = idList.Distinct().ToList();
            
            Console.WriteLine();
            Console.Write(string.Join("|", idList));
            Console.WriteLine();
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,17 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 14 Mb, average nr of threads: 3