This ASP.NET MVC TreeView example demonstrates the multiple node selection functionalities of the TreeView. To select multiple nodes, press the CTRL key and select the desired nodes; or select any node and by pressing SHIFT key select another node, this selects all the nodes in-between the selected nodes.
The TreeView component allows to select multiple nodes by enabling the allowMultiSelection property.
In this demo, the TreeView is enabled with multiple selection
For more information, refer to the Multi Selection section from the documentation.