binding combobox with textbox

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SQL-Server-2005

.NET3.5

C#

.NET

, +

hello
i want to display id in combox and their value (means its name) in textbox
for that purpose i did bellow code..

string Query = "select id, name from LateFee";
           cmd = new SqlCommand(Query, con);

               //con.Open();

               dr = cmd.ExecuteReader();
               DataTable dt = new DataTable();
               dt.Columns.Add("id", typeof(string));
               //dt.Columns.Add("name", typeof(string));
               dt.Load(dr);
               comboBox1.ValueMember = "id";
               comboBox1.DisplayMember = "id";

               comboBox1.DataSource = dt;
               binding = new Binding("Text", comboBox1, "Text");
               textBox1.DataBindings.Add(binding);

but what is happing that in combox when i select id,in text box id is only appear but i want in textbox name should appear.
what should i do???