ARKcc.Form1.tabControlEntities_SelectedIndexChanged C# (CSharp) Method

        private void tabControlEntities_SelectedIndexChanged(object sender, EventArgs e)
        {
            TabControl tc = (TabControl)sender;
            if (tc != null)
            {
                currentList = tc.SelectedIndex;
                switch (currentList)
                {
                    case 0:
                        if (this.treeViewItems.SelectedNode == null)
                        {
                            currentCats = "Items";
                        }
                        else
                        {
                            currentCats = this.treeViewItems.SelectedNode.FullPath;
                        }
                        break;
                    case 1:
                        if (this.treeViewCreatures.SelectedNode == null)
                        {
                            currentCats = "Creatures";
                        }
                        else
                        {
                            currentCats = this.treeViewCreatures.SelectedNode.FullPath;
                        }
                        break;
                    case 2:
                        if (this.treeViewCommands.SelectedNode == null)
                        {
                            currentCats = "Commands";
                        }
                        else
                        {
                            currentCats = this.treeViewCommands.SelectedNode.FullPath;
                        }
                        break;
                }
                textBoxSearch.SelectAll();
                textBoxSearch.Select();
            }
        }