C#中的Hex.decodeHex等效项

using System;

public class HexUtils
{
    public static byte[] DecodeHex(string hex)
    {
        if (hex.Length % 2 != 0)
            throw new ArgumentException("Invalid hex string");

        byte[] result = new byte[hex.Length / 2];

        for (int i = 0; i < hex.Length; i += 2)
        {
            result[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
        }

        return result;
    }
}

string hexString = "48656C6C6F20576F726C64";
byte[] bytes = HexUtils.DecodeHex(hexString);
string decodedString = System.Text.Encoding.UTF8.GetString(bytes);

Console.WriteLine(decodedString);