title: Adding fields to form based on a value in MVC 5
body: <p>I have a drop down in my view. Say the selected value is 1, I want to show the next field as textbox.
  @f.FormGroup().TextBoxFor(model => model.Parameter)</p>
  
  <p>If the selected value is 2, then i need it as a dropdown with a list of values.
  @f.FormGroup().DropDownListFor(model => model.Parameter, Model.ForumList)</p>
  
  <p>If the selected value is 3, then i need to hide the parameter.</p>
  
  <p>What is the best way to acheive this?</p>
  
  <p>Thanks in advance,
  Vanitha.</p>