1-) C# Devexpress Athena -  treeList1 seçilen node'nin ismini alma value

private void treeList1_FocusedNodeChanged(){

 Console.WriteLine(treeList1.Selection[0].GetValue(treeList1.Columns[0]).ToString());

}

pek onemlı degıl ama parent ina ulaşmak istersen

            Console.WriteLine(treeList1.Selection[0].ParentNode.GetValue(treeList1.Columns[0]).ToString());