, ( , HTTP 301) - default_aspx Page_Load, , 301 Moved Permently ( 302 Moved Temporarily).
void Page_Load(...) {
if(Request.Path.EndsWith("default.aspx", true, null)) {
Response.StatusCode = 301;
Response.StatusDescription = "Moved Permanently";
Response.Headers.Add("Location", "/");
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
}