将十六进制字符串转换为字节数组(.NET)的最佳方法是什么？

using System;
using System.Text;

class Program
{
    static void Main()
    {
        string hexString = "0x0123456789ABCDEF";
        byte[] byteArray = Encoding.Unicode.GetString(hexString).GetBytes();
        Console.WriteLine(byteArray.Length);
    }
}

using System;
using System.Text;

class Program
{
    static void Main()
    {
        string hexString = "0x0123456789ABCDEF";
        byte[] byteArray = Encoding.Unicode.GetString(hexString).GetBytes();
        Console.WriteLine(byteArray.Length);
        Console.WriteLine(Convert.ToString(byteArray));
    }
}