Method CollapseAll
CollapseAll()
Collapses this item and all the child items recursively. After calling this method, value of IsExpanded property will be false for this item and all its child items.
public virtual void CollapseAll()
Collapses this item and all the child items recursively. After calling this method, value of IsExpanded property will be false for this item and all its child items.
public virtual void CollapseAll()