using (SqlCeConnection conn = new SqlCeConnection(validateConnStr))
{
    using (SqlCeCommand cmd = new SqlCeCommand(@"SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES", conn))
    {
        try
        {
            conn.Open();
            SqlCeDataReader rdr = cmd.ExecuteReader();
            string[] tableArr = { "FirstTable", "SecondTable" };
            int ta = 0;
            while (rdr.Read())
            {
                if (rdr.GetString(0) != tableArr[ta])
                {
                    isValidDbFile = false;
                }
                else
                {
                    isValidDbFile = true;
                }
                ta++;
            }
        }
        catch (Exception ex)
        {
            //MessageBox.Show(ex.ToString());
        }
        finally
        {
            conn.Close();
        }
    }
}