How to display two different columns in one combobox c#

Question

How to display two different columns in one combobox windows form c#

DataRow dr;

con.Open();

SqlCommand cmd = new SqlCommand("select Product_ID,Name,Bar_Code from Product", con);

SqlDataAdapter sda = new SqlDataAdapter(cmd);

DataTable dt = new DataTable();

sda.Fill(dt);

dr = dt.NewRow();

dr.ItemArray = new object[] { 0, "--Select Product--" };

dt.Rows.InsertAt(dr, 0);

comboBoxproduct.ValueMember = "Product_ID";

comboBoxproduct.DisplayMember = "Name" or "Bar_Code";

comboBoxproduct.DataSource = dt;

con.Close();