2009-11-16 Marek Habersack <mhabersack@novell.com>

2009-11-16  Marek Habersack  <mhabersack@novell.com>

	* TreeNodeTest.cs: added test for a situation when a
	node already contains children when the PopulateOnDemand property
	is set.

2009-11-16  Marek Habersack  <mhabersack@novell.com>

	* TreeNodeCollection.cs: whenever a node is added, let the owner
	know about it.

	* TreeNode.cs: added internal property HadChildrenBeforePopulating
	which is used to let TreeView know about an error condition where
	a populate-on-demand node contains children added outside the
	OnTreeNodePopulate event

	* TreeView.cs: if a node has any child nodes and PopulatOnDemand
	is set, throw an exception from RenderNode. This is the behavior
	of .NET

svn path=/trunk/mcs/; revision=146275