[C#]文本内容的大小

        private void GetTextSize()
        {
            byte[] bys = Encoding.Default.GetBytes(richTextBox1.Text);
            LB_TextSize.Text = String.Format("{0},文字长度：{1}", richTextBox1.Text.Length,GetSize(bys.Length));

        }
        private string GetSize(decimal size)
        {
            string[] unit = new string[] {"B","KB","MB","GB","TB" };
            int i=0;
            for (; i < unit.Length-1 && size > 1024; i++)
            {
                size = size / 1024;
            }
            return String.Format("{0} {1}", Math.Round(size, 4), unit[i]);
        }