title: Redirect to another controller+ action without changing URL in ASP.Net MVC3
body: <p><strong>Note</strong>: Below is just a small demo sort to simulate what i am looking for:</p>
  
  <p>Below are the urls format on my app that user can see</p>
  
  <pre><code>mydomain.com/cat/1  --display cat with id 1 |controller=Cat, action=DisplayDetails
  mydomain.com/dog/2  --display dog with id 2 |controller=Dog, action=DisplayDetails
  mydomain.com/cow/2 --display cow with id 3  |controller=Cow, action=DisplayDetails
  </code></pre>
  
  <p>I have maintained a system where no 2 animals(may be of different kind) can have same id, it means if there is a cat with id=1, we cant have any other animal with that id. Also from my system i can extract animal details+ type just from animal id</p>
  
  <p>Apart from existing URL pattern, I am planning to create a short  Url in format as below</p>
  
  <pre><code>mydomain.com/1  --this will show cat
  mydomain.com/2  --this will show dog
  mydomain.com/3  --this will show cow
  </code></pre>
  
  <p>Routes i have created are as below, and they appear same order in global.asax</p>
  
  <pre><code>pattern= Cat/{id}, controller= Cat, action=DisplayDetails
  pattern= Dog/{id}, controller= Dog, action=DisplayDetails
  pattern= Cow/{id}, controller= Cow, action=DisplayDetails
  pattern= {id}, controller= DisplayAnyAnimal ----------i want help in this Route
  </code></pre>
  
  <p><strong>Currently Controller looks like this</strong></p>
  
  <pre><code>public class DisplayAnyAnimalContoller : Controller
  {
        public ActionResult Index(string animalId)
        {
             //iam processing request here from animalId
             //now i know which contoller+action needs to be executed
  
            //say for instant i have to display dog with id=2
  
            //currently iam doing this to redirect and its working fine, 
            //but it changes url
            -----------------------------------------------
            #########################
            ### i need help here  ###       
            #########################
           return RedirectToRoute(new {contoller="Dog",action="DisplayDetails",id=2 });             
            -----------------------------------------------
        }
  }
  </code></pre>
  
  <p>Now the problem with <code>RedirectToRoute</code> / <code>RedirectToAction</code> is they both changes the URL. But i dont want to change my url pattern.</p>
  
  <p>Please suggest me how to achieve this, you may suggest some entirely different way, to achieve this</p>