让WF4设计器处于只读模式

this.wd = new WorkflowDesigner();
this.wd.Load(new Flowchart());
 
ReadOnlyState state = this.wd.Context.Items.GetValue<ReadOnlyState>();
state.IsReadOnly = true;

这样在设计器中就不允许修改工作流定义了

参考：http://blogs.msdn.com/b/kushals/archive/2009/09/14/re-hosting-the-workflow-desinger-in-read-only-mode.aspx