asp.net web api - How to use the same route with different parameter types? -

i have api controller 2 different actions take different parameter types.

    // get: users/sample%40email.com     [route("users/{emailaddress}")]     public ihttpactionresult getuser(string emailaddress)      // get: users/1d8f6b90-9bd9-4cdd-babb-372242ad9960     [route("users/{reference}")]     public ihttpactionresult getuserbyreference(guid reference) 

problem multiple actions found matching when make request either. looking @ other answers thought needed setup routes in webapiconfig so...

            config.routes.maphttproute(             name: "apiemail",             routetemplate: "api/{controller}/{action}/{email}"             );          config.routes.maphttproute(             name: "apireference",             routetemplate: "api/{controller}/{action}/{reference}"             ); 

what need each action called based on parameter type pass in?

i'm new web.api additional explanation text appreciated.

you below method declaration attribute routing enabled: //declare method guid 1st

// get: users/1d8f6b90-9bd9-4cdd-babb-372242ad9960 [route("users/{reference:guid}")] public ihttpactionresult getuserbyreference(guid reference) 

and declare other method below

// get: users/sample%40email.com [route("users/{emailaddress}")] public ihttpactionresult getuser(string emailaddress) 

please let me know, work ?