# Unbound Mode

**RadMultiColumnComboBox** supports unbound mode allowing to add columns and rows programmatically.

#### Unbound mode

```C#
this.radMultiColumnComboBox1.MultiColumnComboBoxElement.Columns.Add("Name");
this.radMultiColumnComboBox1.MultiColumnComboBoxElement.Columns.Add("Id");

for (int i = 0; i < 10; i++)
{
    this.radMultiColumnComboBox1.EditorControl.Rows.Add("Item" + i, i);
}
```

```VB.NET
Me.RadMultiColumnComboBox1.MultiColumnComboBoxElement.Columns.Add("Name")
Me.RadMultiColumnComboBox1.MultiColumnComboBoxElement.Columns.Add("Id")

For i As Integer = 0 To 9
    Me.RadMultiColumnComboBox1.EditorControl.Rows.Add("Item" & i, i)
Next
```

> caption Figure 1: Unbound mode

![WinForms RadMultiColumnComboBox Unbound mode](https://www.telerik.com/products/winforms/documentation/assets/aeea5419189fa5a18e82aa5ed594442b/multicolumncombobox-unbound-mode001.png)

## See Also

* [Data Binding](https://www.telerik.com/products/winforms/documentation/controls/multicolumncombobox/populating-with-data/databinding)