Gets or sets the image list index value of the image displayed when the tree node is in the unselected state.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The ImageKey and properties are mutually exclusive; therefore, if one property is set, the other is ignored. If you set the ImageKey property, the property is automatically set to -1. Alternatively, if you set , ImageKey is automatically set to an empty string ("").
The following code example creates and assigns an ImageList to a TreeView control and fills the TreeView control with TreeNode objects. The tree nodes are assigned images from the ImageList that is displayed when the tree node is in a selected or unselected state. This example requires that you have a Form that contains a TreeView, and an ArrayList that contains Customer objects that each contain Order objects. It also requires that the Customer and Order objects are defined.