C# .NET CAD二次开发PaletteSet设置Dock属性不生效的问题

 新建一个停靠窗口PaletteSet的Dock属性时，使用以下代码发现不生效：

var ps = new Autodesk.AutoCAD.Windows.PaletteSet("test");
ps.Size = new System.Drawing.Size(150, 300);
ps.Dock = Autodesk.AutoCAD.Windows.DockSides.Left;
System.Windows.Forms.UserControl myCtrl = new SidebarForm();
ps.Add("subtest", myCtrl);
ps.Visible = true;

经过搜索得知，设置Dock属性前，必须设置Visible属性为true，否则Dock属性不生效，正确代码如下：

var ps = new Autodesk.AutoCAD.Windows.PaletteSet("test");
ps.Size = new System.Drawing.Size(150, 300);
ps.Visible = true;
ps.Dock = Autodesk.AutoCAD.Windows.DockSides.Left;
System.Windows.Forms.UserControl myCtrl = new SidebarForm();
ps.Add("subtest", myCtrl);