生成12位十六进制密码

Random r = new Random();
            byte[] bytes = new byte[6];
            
            var t = new StringBuilder();
            for (int j = 0; j < 16; j++)
            {
                r.NextBytes(bytes);
                t.AppendLine("KeyA["+ j +"] = "" + ByteHexHelper.ByteToHex(bytes) + "";");
            }
            for (int j = 0; j < 16; j++)
            {
                r.NextBytes(bytes);
                t.AppendLine("KeyB[" + j + "] = "" + ByteHexHelper.ByteToHex(bytes) + "";");
            }
            textBox3.Text = t.ToString();