PurplePen.CourseSelector.UpdateNodeBasedOnChildren C# (CSharp) Method

        void UpdateNodeBasedOnChildren(TreeNode parent)
        {
            bool anyUnchecked = false;

            foreach (TreeNode childNode in parent.Nodes)
                if (!childNode.Checked)
                    anyUnchecked = true;

            parent.Checked = !anyUnchecked;
        }