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

        private void SaveBtn_Click(object sender, EventArgs e)
        {
            if (List.Type == ConditionType.Not)
            {
                if (ConditionTree.Nodes[0].Nodes.Count == 0)
                {
                    MessageBox.Show("You must define a criteria.");
                    return;
                }
            }
            else
            {
                if (ConditionTree.Nodes[0].Nodes.Count < 2)
                {
                    MessageBox.Show("You must define 2 criteria's.");
                    return;
                }
            }

            // Generate a new list, and store it in the Node.Tag
            List = (ConditionList)MedalDataParser.ParseNodeConditions(ConditionTree.Nodes[0]);
            Node.Tag = List;

            // For AND (and) OR lists, since we can add and remove elements (thus losing references),
            // we must clear the condition nodes, and rebuild them from scratch
            if (List.Type == ConditionType.And || List.Type == ConditionType.Or)
            {
                Node.Nodes.Clear();
                foreach (var something in List.GetConditions())
                    Node.Nodes.Add(something.ToTree());
            }

            // Signal to the DataEditor that we made changes
            MedalDataEditor.ChangesMade = true;
            this.DialogResult = DialogResult.OK;
        }