I have a combocox the name is "cmbModel" I want to fill the database with two different values in a table.
This is what I have done:

```
private void Form1_Load(object sender, EventArgs e)
        {
            using (LINQSQLDataContext db = new LINQSQLDataContext())
            {
                cmbModel.DisplayMember = "szModel";
                cmbModel.DataSource = db.VehEcus.ToList<VehEcu>();
            }
        }

```

this will fill my cmbModel with szModel column of my table but I want to avoid repeating , how can I use "`distinct`" in query to achieve my goal?
and also I want to show 2 items of my table like "`modelID-szModel`" in my combobox

Thanks