将字符数组写到字符串

StringWrite和StringBuilder类来完成 

protected void Page_Load(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder("One Word");
        Response.Write("写入之前<br/>");
        Response.Write(sb.ToString());
         char[] c = { ',', 'O', 'n', 'e' };
         StringWriter sw = new StringWriter(sb);
      //写入字符传
         sw.Write(c,0,4);
         Response.Write("写入之后<br/>");
         Response.Write(sb.ToString());



    }