BF2Statistics.MedalData.ConditionListForm.DeleteCriteria C# (CSharp) Method

        public void DeleteCriteria()
        {
            TreeNode SelectedNode = ConditionTree.SelectedNode;

            // Make sure we have a node selected
            if (SelectedNode == null)
            {
                MessageBox.Show("Please select a criteria to edit.");
                return;
            }

            // Make sure we can't delete the parent node
            // Mostly because we need to keep references intact
            if (SelectedNode.Parent == null) return;

            // Dont delete on Plus / Div Trees
            if (!(SelectedNode.Tag is ConditionList))
            {
                TreeNode Parent = SelectedNode.Parent;
                if (Parent == null)
                    return;

                // If we are in the root condition list
                if (Parent.Parent == null || Parent.Parent.Tag == null)
                {
                    ConditionTree.Nodes.Remove(SelectedNode);
                    return;
                }

                // Get the parents condition list
                ConditionList C = (ConditionList)Parent.Tag;

                // Remove the whole tree if its a not statement
                if (C.Type == ConditionType.Not)
                    ConditionTree.Nodes.Remove(Parent);

                // We donot handle nested condition lists in this form
                else if (C.Type == ConditionType.Plus || C.Type == ConditionType.Div)
                {
                    ConditionTree.SelectedNode = Parent;
                    EditCriteria();
                }
                else
                {
                    ConditionTree.Nodes.Remove(SelectedNode);
                }
            }
            else
                ConditionTree.Nodes.Remove(SelectedNode);

            ConditionTree.Refresh();
        }