Use the TreeNodeStyleCollection.RemoveAt(int) method to remove the System.Web.UI.WebControls.TreeNodeStyle object at the specified zero-based index location from a System.Web.UI.WebControls.TreeNodeStyleCollection object. All the items that are located after the removed node are then moved up one level to fill the vacant position in the tree structure. The indexes of the moved items are also updated.

As an alternative, you can remove a specific System.Web.UI.WebControls.TreeNodeStyle object by using the TreeNodeStyleCollection.Remove(TreeNodeStyle) method. You can also remove every node in the collection by using the TreeNodeCollection.Clear method.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0