C#统计文本单词的个数

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            textBox2.Text = getWordSum(textBox1.Text).ToString();
        }

        private int getWordSum(string text)
        {
            string textbasic = text;
            char[] basictemp = text.ToCharArray();
            int chfrom = Convert.ToInt32("4e00", 16);    //范围（0x4e00～0x9fff）转换成int（chfrom～chend）
            int chend = Convert.ToInt32("9fff", 16);
            foreach (char c in basictemp)
            {
                if (' ' != c)
                {
                    string temp = c.ToString();
                    int firstcode = char.ConvertToUtf32(temp, 0);
                    if (firstcode >= chfrom && firstcode <= chend)
                    {
                        textbasic = textbasic.Replace(c, ' '); 
                    }
                }
            }

            char[] ch = new char[] { ' ', ',', '?', '!', '(', ')', '\n' };
            string[] stemp = textbasic.Split(ch, StringSplitOptions.RemoveEmptyEntries);

            return stemp.Length;
        }