public static void ShowActivityStruct(object activity)
        {
            if (activity is System.Workflow.ComponentModel.CompositeActivity)
            {
                System.Workflow.ComponentModel.CompositeActivity wxd;
                wxd = (System.Workflow.ComponentModel.CompositeActivity)activity;
                string s;
                foreach (object temp in wxd.Activities)
                {
                    ShowActivityStruct(temp);//递归
                }
               
              
            }
            else
            {
                if (activity is System.Workflow.ComponentModel.Activity)
                {
                    System.Workflow.ComponentModel.Activity wxd;
                    wxd = (System.Workflow.ComponentModel.Activity)activity;
                    string s;
                    s = string.Format("说明:{0},名称:{1},类型:{2}", wxd.Description, wxd.QualifiedName, wxd.GetType().ToString());
                    Console.WriteLine(s);
                }
            }
        }

调用