Something

 foreach (System.Type objType in SampleAssembly.GetTypes())
            {
                if (objType.BaseType.ToString() == "System.Windows.Forms.Form" && objType.Name == sender.ToString())
                {
                    ToolStripMenuItem objSubItem = new ToolStripMenuItem(objType.Name, null, new EventHandler(MenuClick));
                    Object b = Activator.CreateInstance(objType);
                    ((Form)b).Show();
                }
            }