Winform Multi Select Treeview

This is not going to be easy to do with a standard WinForms TreeView control. The TreeView control only supports single selection per tree. It is not possible to simultaneously select multiple nodes in the tree.
In order to get this behavior you would likely end up needing to create a very similar class to TreeView which allowed for multiple selection. Another option is to derive from TreeView and enable multiple selection by overriding specific behaviors. Here is an article on how to do the latter.

try this link

http://www.arstdesign.com/articles/treeviewms.html