C#点击树节点选择MDI窗口

D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\ResolveAssemblyReference.cache D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.Form1.resources D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.Properties.Resources.resources D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.csproj.GenerateResource.Cache D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\bin\Debug\WindowsApplication2.exe D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\bin\Debug\WindowsApplication2.pdb D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\bin\Debug\WeifenLuo.WinFormsUI.Docking.dll D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.exe D:\工作夹\movepicture\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.pdb D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.exe D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.pdb D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\bin\Debug\WindowsApplication2.exe D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\bin\Debug\WindowsApplication2.pdb D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\ResolveAssemblyReference.cache D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.Form1.resources D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.Properties.Resources.resources D:\例程\Tree-MDI\WindowsApplication2\WindowsApplication2\obj\Debug\WindowsApplication2.csproj.GenerateResource.Cache