public void Func()
        {
            OleDbCommand command = new OleDbCommand();
            
            command.CommandType = CommandType.Text;
        
            command.CommandText = "select ...  from  " +
        " where date > ?  ";
 
            string connectionString = @"Provider=SQLOLEDB.1;Password=admin; Persist Security Info=True; User ID=user; Initial Catalog=magazin;Data Source=SERVER\SQLEXPRESS";
 
             OleDbParameter date1Parametr = new OleDbParameter();
              date1Parametr.ParameterName = "@date1";
              date1Parametr.OleDbType = OleDbType.DBDate;
               date1Parametr.Value = dateTimePicker1.Value;
              command.Parameters.Add(date1Parametr);
 
 
 dsTest dSet = new dsTest(); 
 
            using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(command.CommandText, connectionString))
            {
               
                dataAdapter.Fill(dSet.DataTable1); // здесь вылетает окно с ошибкой
 
                ((Form1)Application.OpenForms["Form1"]).bindingSource1.DataSource = dSet.DataTable1 ;
                ((Form1)Application.OpenForms["Form1"]).dataGridView1.DataSource = ((Form1)Application.OpenForms["Form1"]).bindingSource1;
            }
}