title: ASP.Net MVC Postback does not clear textbox
body: <p>On a .cshtml page I have a single textbox inside a form. When I enter some text and press return it triggers a POST to a controller of the same name (different signature). The code processes the text and a model is created and passed back to the same page where in addition to the original textbox a grid is now populated (conditionally). Everything works, except the text in the textbox is retained.</p>
  
  <p>This is a little odd, considering that most of the questions on here are about retaining the text after a POST and the indication has been that the text should not automatically be retained.</p>
  
  <p>I can probably assign the textbox an empty string but I am simply wondering if I have this wrong?</p>