value of combo box...

Question

i want to access value of selected item in combobox in win form.

 

code is:---------------------------------

 

combo1.Items.Add(ds.Tables[alias_table].Rows[rno][field_name].ToString());
combo1.ValueMember = ds.Tables[alias_table].Rows[rno][field_id].ToString();
combo1.DisplayMember = ds.Tables[alias_table].Rows[rno][field_name].ToString();

 

then how i can accesee that valuemember?