# ImageList

The `ImageList` component is typically used by other controls, such as the `ListView`, `TreeView`, or `ToolBar`. You can add bitmaps or icons to the `ImageList`, and the other controls are able to use the images as they require.

The Wisej.NET `ImageList` component is used to store images, which can then be displayed by controls. An image list allows you to write code for a single, consistent catalog of images. For example, you can rotate images displayed by a `Button` control simply by changing the button's `ImageIndex` or `ImageKey` property. You can also associate the same image list with multiple controls. For example, if you are using both a `ListView` control and a `TreeView` control to display the same list of files, changing a file's icon in the image list will cause the new icon to appear in both views.

{% hint style="info" %}
For a full list of properties, methods and events see the [API documentation.](http://docs.wisej.com/api)
{% endhint %}

## Features

### Resizing

When set, the `ImageSize` property will automatically force all images in the `ImageSet` to become the given size.

![ImageList resizing demonstration](/files/-MjVM-2icQgKMRf1BAiE)

### Transparent Color

When set, the `TransparentColor` property specifies which color in the image should be treated as transparent.

**Original Image:**

![Image before applying transparent color](/files/-MgrBjyC4r1CMS74DO4w)

## How To

### Add images to the ImageList

```csharp
ImageList imageList1 = new ImageList();
imageList1.Images.Add("tree", Image.FromFile("tree.jpg"));
imageList1.Images.Add("apple", Image.FromFile("apple.png"));
```

In this code example, both tree.jpg and apple.png are located in the root folder of the project.


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