<asp:ValidationSummary id="valSummary" runat="server" DisplayMode="BulletList" ShowSummary="true" />

<label for="txtStudentFirstName">First Name</label>

<telerik:RadTextBox ID="txtStudentFirstName" runat="server" CssClass="RadTextBox" MaxLength="30" />

protected void Page_Load(object sender, EventArgs e)
    {
        RadGrid1.NeedDataSource += new GridNeedDataSourceEventHandler(RadGrid1_NeedDataSource);
        RadGrid1.PreRender += new EventHandler(RadGrid1_PreRender);
        RadGrid1.ItemDataBound += new GridItemEventHandler(RadGrid1_ItemDataBound);
    }

    protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
    {
        //RadGrid1.MasterTableView.AutoGeneratedColumns[7].HeaderStyle.Width = Unit.Pixel(40);
        //RadGrid1.MasterTableView.AutoGeneratedColumns[10].HeaderStyle.Width = Unit.Pixel(40);
    }

    protected void RadGrid1_PreRender(object sender, EventArgs e)
    {

    }

    protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
    {
        RadGrid1.DataSource = GetResultsTable();
    }

    public DataTable GetResultsTable()
    {
        DataTable dt = new DataTable();

        for (int i = 0; i < 70; i++)
        {
            dt.Columns.Add("Column " + i);
            List<object> objectNumbers = new List<object>();

            for (int j = 0; j < 10; j++)
            {
                objectNumbers.Add(i.ToString() + "," + j.ToString());
            }

            while (dt.Rows.Count < objectNumbers.Count)
            {
                dt.Rows.Add();
            }

            for (int k = 0; k < 10; k++)
            {
                dt.Rows[k][i] = objectNumbers[k];
            }
        }
        return dt;
    }