按“新增“按钮以后，treeview控件不可操作enable=false,但是选中的结点在treeview失去焦点后还是可以以灰色显示，以提示用户当前操作的结点； 我将treeview 的HideSelection属性设为false;可能实现treeview控件失去焦点后仍可以灰色显示选中的结点； 但是仍可以操作treeview ...

I'm working on an RSS reader in .NET 2.0. It's a WinForms app. Like most RSS readers, it's got an outlook-style layout with a TreeView control on the left hand side that holds your feed subscriptions ...