asp.net mvc - Return action does not work correctly -

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i have simple create action save product db. after saving product have used return view(new product()); reset form fields form show old data(the data before submit form). use return view(new product(name="test")); not work too. problem? product saved db correctly (it means modelstate.isvalid true). don not want use redirecttoaction.

    [httppost]     public actionresult new(product product)     {         if (modelstate.isvalid)         {             product.submitdate = datetime.utcnow;             productrepository.add(product);             productrepository.save();              //viewbag.message = "product saved";             return view(new product());         }          return view(product);     }

i think recommended practice use redirecttoaction() if want try way, try

 modelstate.clear();  return view(new product());

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