# Basic Operations

## Content



The MultiColumnCombo control lets you perform some basic operations such as adding items, removing items, and much more in unbound mode. Lets explore how you can perform these operations on MultiColumnCombo dropdown items in the following sections.

## Add Items

You can add items to the MultiColumnCombo dropdown in unbound mode using [AddItem](/componentone/docs/win/online-multicolumncombo/) method of the [C1MultiColumnCombo](/componentone/docs/win/online-multicolumncombo/) class. The **AddItem** method allows you to populate individual rows within the list.

Use the following code snippet to add rows to the MultiColumnCombo dropdown.

```csharp
mcc.AddItem("Item1");
mcc.AddItem("Item2");
mcc.AddItem("Item3");
mcc.AddItem("Item4");
```

## Insert Items

You can use [InsertItem](/componentone/docs/win/online-multicolumncombo/) method of the **C1MultiColumnCombo** class to insert an item at the specified index position of view in the unbound mode. The following code demonstrates how to insert the fifth item in the MultiColumnCombo dropdown.

```csharp
mcc.InsertItem("Item5", 4);
```

## Remove Items

The [RemoveItem](/componentone/docs/win/online-multicolumncombo/) method allows you to remove an item from the specified position in unbound mode. The following code demonstrates how to remove the selected item from the MultiColumnCombo control:

```csharp
mcc.RemoveItem(mcc.ItemsCount - 1);
```

## Clear Items

The [ClearItems](/componentone/docs/win/online-multicolumncombo/) method removes all items in unbound mode. The following code removes the entire item list from from the MultiColumnCombo dropdown.

```csharp
mcc.ClearItems();
```