Unity C# 將String字符串轉換爲16進制Byte數組

今天開發過程中後臺給了我一個已經轉成string了的16進制字符串，我這邊做了些處理，將str又轉回16進制，並以16位16進制byte數組的形式存放了。

    void Start()
    {
    string str = "qqwweerrttyyuuiiooppaassddffgghh"
    print (strToToHexByte(str));
    }
 /// <summary>
    /// 字符串轉16進制字節數組
    /// </summary>
    /// <param name="hexString"></param>
    /// <returns></returns>
    private static byte[] strToToHexByte(string hexString)
    {
        hexString = hexString.Replace(" ", "");
        if ((hexString.Length % 2) != 0)
            hexString += " ";
        byte[] returnBytes = new byte[hexString.Length / 2];
        for (int i = 0; i < returnBytes.Length; i++)
            returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
        return returnBytes;
    }