TreeViewItem is a class in the System.Windows.Controls namespace used for creating hierarchical data structures in WPF applications. It is part of the WPF framework.
Code example:
TreeViewItem rootItem = new TreeViewItem(); rootItem.Header = "Root";
TreeViewItem childItem1 = new TreeViewItem(); childItem1.Header = "Child1";
TreeViewItem childItem2 = new TreeViewItem(); childItem2.Header = "Child2";
Description: This code creates a TreeViewItem called 'rootItem', with the header "Root". Two child TreeViewItems are created, and added to the root item's Items collection. The 'Header' property is used to set the display text of the TreeViewItems.
Package library: This code is part of the WPF framework, and requires the System.Windows.Controls namespace to be included.
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