public event SelectionChangedEventHandler SelectionChanged

Public Event SelectionChanged As SelectionChangedEventHandler

void RadTreeView1_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
{
    // get a reference to the item that has been selected
    RadTreeViewItem newSelectedItem = e.Source as RadTreeViewItem;

    // get the list of the added items to selection
    IList addedItems = e.AddedItems;

    // get the list of the removed items from the selection
    IList removedItems = e.RemovedItems;

    // get a reference to the RadTreeView
    RadTreeView treeView = (sender as RadTreeView);
}

No code example is currently available or this language may not be supported.

<telerik:RadTreeView 
    x:Name="RadTreeView1" 
    SelectionChanged="RadTreeView1_SelectionChanged"/>