using System;

using System.IO;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string input = "|22u|20D|29zw|7B|83|805|22|2B|20D|20|20|20|20|3E|20|20|20|20|20|3E|20|20|20|20|20|3E|20|20|20|20|20|20|20|2B|2A45|2E|29";

        var output = new MemoryStream();

        int index = 0;

        while (index < input.Length)

        {

            if (input[index] == '|')

            {

                output.WriteByte((byte)Convert.ToInt32(input.Substring(index + 1, 2), 16));

                index += 3;

            }

            else

            {

                output.WriteByte((byte)(int)input[index]);

                index++;

            }

        }

​

        var bytes = output.ToArray();

        Console.WriteLine($"var bytes = new byte[] {{ {string.Join(", ", bytes.Select(b => $"0x{b:x2}"))} }}");

    }

}