mapping querystring contains special character

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WebAPI

How we can a map a route to the below action get in WEB api with query string is product-Id:347DCYA3-FE25



this is the route configuration



config.Routes.MapHttpRoute("product", "product/{productId}", new { controller = "product", action = "get" });



route



routes.MapRoute("Default", "{controller}/{productId}", new { controller = "product",



action = "get", id = UrlParameter.Optional });



in controller [httpget] public void get (string productId) { }



i have decoded the value product-Id:347DCYA3-FE25 and pass it as query string still it will not take.....