how i can make combobox with 2listbox ?

If you are using Windows Forms then the following procedure can be used to get the above result.
1. Create a DataTable as shown below using Expression for the NameAndPrice column.

DataTable Persons = new DataTable();
Persons.Columns.Add("Name",typeof(string),null);
Persons.Columns.Add("Price",typeof(decimal),null);
Persons.Columns.Add("NameAndPrice",typeof(string),"Name + ': ' + Price");
//Add sample data
Persons.Rows.Add("John",45.45);
Persons.Rows.Add("Mehul",54.34);

2. Then assign the Persons DataTable to the DataSource property of ComboBox and ListBoxes and set the ValueMember and DisplayMember properties as shown below:

listBox1.DataSource = Persons;
listBox1.ValueMember= "Name";
listBox1.DisplayMember="Name";

comboBox1.DataSource = Persons;
comboBox1.ValueMember= "Name";
comboBox1.DisplayMember= "NameAndPrice";

listBox2.DataSource = Persons;
listBox2.ValueMember= "Name";
listBox2.DisplayMember="Price";