Email Verification URL in ASP.NET WEB API

how can I use given URL for email varfication in ASP.NET WEB API?
 

var Email="test@test.com"
var key="122";
 
"http://localhost:50740/api/Users/VerifyEmail/" + Email + "/" + key

 

when i enter into web browser, debug it
 

[HttpGet]
public HttpResponseMessage VerifyEmail(string email, string verificationKey)
{
}

paramters of action method are always null.

in Global.asax.cs i have defined following route
 

routes.MapHttpRoute(
                name: "EmailVerification",
                routeTemplate: "api/{controller}/{action}/{email}/{verificationKey}",
                defaults: new { action = "VerifyEmail", email = "", verificationKey = "" }
             );	   

basically, I want verification email to be handled which has two parameters email and key.
 
your response will be appreciated.