TreeView性能

当使用TreeView控件且控件添加数据量很大时，推荐使用AddRange方法

private void Form7_Load(object sender, EventArgs e)
        {
            var stopwatch = Stopwatch.StartNew();
            stopwatch.Start();
            //执行40000次Add，消耗时间为28000
            for (int i = 0; i < 40000; i++)
            {
                treeView1.Nodes.Add($"{i}-{i}");
            }

            ////执行AddRange，消耗时间为1300
            //var list = new List<TreeNode>();
            //for (int i = 0; i < 40000; i++)
            //{
            //    // treeView1.Nodes.Add($"{i}-{i}");
            //    list.Add(new TreeNode($"{i}-{i}"));
            //}


            //treeView1.Nodes.AddRange(list.ToArray());


            stopwatch.Stop();
            Console.WriteLine($"{stopwatch.ElapsedMilliseconds}");
        }