gistfile1.cs

 [HttpPost]
    public ActionResult ReceivePaperVersion(Application a,ReceivePaperVersionInput inp){
      var r=new Func<ActionResult>(()=>RedirectToAction("Details",new {a.Id}));
      return this.Do(
        ()=>{
          a.ReceivePaperVersion(inp.PaperVersionSendDate.Value,inp.PaperVersionArrivalDate.Value);
          this.Flash("Application paper version received!");
          return r();
        },r); //1st arg==happy path, 2nd arg==onFail
    }