how to define tr in table dynamically

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ASP.NET

HTML

in my application i am adding table dynamically and bind data in table. i want after display 3 record in same line of page next record would be display on next line not in same line means every tr display 3 record after that it display on next line. below i m write code

protected void Page_Load(object sender, EventArgs e)
    {
        //DataTable dt = new DataTable();
        SqlConnection con = new SqlConnection();
        con.ConnectionString = ConfigurationManager.ConnectionStrings["ConnStringDb1"].ConnectionString;
        SqlCommand cmd = new SqlCommand("select divhtml_content from content_managment where page_id = '3'", con);
        DataTable dt = new DataTable();
        SqlDataAdapter ad = new SqlDataAdapter();

        ad.SelectCommand = cmd;
        ad.Fill(dt);
        table1.Rows.Clear();

        HtmlTableRow tr = new HtmlTableRow();
      
        foreach (DataRow dr in dt.Rows)
        {
           
               
                HtmlTableCell tc = new HtmlTableCell();
                // tc.Width = "100px";
                tc.InnerHtml = dr["divhtml_content"].ToString();
                tr.Cells.Add(tc);
                table1.Rows.Add(tr);
            }
            // do something with each row in the results...
        
          
        
    }