Redirection page for error(In Web Config)

Error : 404 page not found
Response.StatusCode = (int)HttpStatusCode.NotFound;

Error : 301 -moved permanently
Response.StatusCode = (int)HttpStatusCode.MovedPermanently;

Response.Write("This page has moved.<br/><a href=" + ReURL + ">Click here</a> to proceed to the new page.");
Response.AddHeader("Location", ReURL);