how to handle no row at position error messages

I am getting an error:

There is no row at position 4

This means that the datatable doesn't have the row number I specified.

Below is an example:

protected void btnNext_Click1(object sender, EventArgs e)
{
    if (Session["ClickCount"] == null)
        Session["ClickCount"] = 0;

    int ClickCount = Convert.ToInt32(Session["ClickCount"]) + 1;
    Session["ClickCount"] = ClickCount;

    DAL.TicketsDataSetTableAdapters.TicketDetailsTableAdapter eobj = new DAL.TicketsDataSetTableAdapters.TicketDetailsTableAdapter();
    DataTable dt = new DataTable();
    dt = eobj.GetTicketUpdates(txtSupportRef.Text);

    if (ClickCount > dt.Rows.Count)
    {
        // HOW DO WE HANDLE THE ERROR?
    }
    txtNextStep.Text = dt.Rows[ClickCount - 1]["NextStep"].ToString();
}

I have 3 rows in my datatable and if click the button again it will give me the error message above.

What is the best way to handle this error message?

Should I exit out of the the if statement and then present the user with a message?