public void AttributeValueChanged()
{
// Select the html node.
treeView.SelectedNode = htmlTreeNode;
treeViewContainer.ShowAttributes(doc.DocumentElement.Attributes);
Assert.IsNotNull(attributesGrid.SelectedGridItem);
treeViewContainer.IsDirty = false;
dirtyChanged = false;
treeViewContainer.CallAttributesGridPropertyValueChanged();
Assert.IsTrue(treeViewContainer.IsDirty);
Assert.IsTrue(dirtyChanged);
}