How to get field value from current active record ?

[Virtuo]

Hi people...

I am new to dotNet, specially to ADO.NET Entity framework. I have a problem... I can not find a way to get field value from current active row! Here is a code I use :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Linq;
using System.Data.Entity;
using DevExpress.XtraEditors;
using DevExpress.Utils.Menu;
using newAWModel;
 
namespace KupciApp
{
  public partial class frmDoc : DevExpress.XtraEditors.XtraForm
  {    
 
    LTEntities context;
 
    public frmDoc()
    {
      InitializeComponent();
    }
 
    private void simpleButton1_Click_1(object sender, EventArgs e)
    {
      this.Close();
    }
 
    private void frmDoc_Load(object sender, EventArgs e)
    {
      context = new LTEntities(); 
      var query = context.Customers;
      customerBS.DataSource = query.ToList();
 
    }
 
    private void simpleButton2_Click(object sender, EventArgs e)
    {
 
      frmNewCustomer frmNewCust = new frmNewCustomer(10); // I would like to replace value 10 with current value of field CustomerID !
      frmNewCust.Text = "New customer";      
 
      if (frmNewCust.ShowDialog(this) == DialogResult.OK)
      {
       context.Refresh(System.Data.Objects.RefreshMode.StoreWins, context.Customers);
      }
 
    }
 
    private void simpleButton4_Click(object sender, EventArgs e)
    {
      context.Refresh(System.Data.Objects.RefreshMode.StoreWins, context.Customers);
      customerBS.ResetBindings(false);
    }
 
 
  }
}
 

Notice the "query.ToList();" I think bindingsource is the answer, but I can not simpe create a DataRow or DataRowView object and access field values because I use "ToList()" ! I am stuck! Please help !