asp.net - The requested resource does not support http method 'GET' when doing cross-domain ajax call -

i'm performing cross-domain post using jquery ajax call asp.net 4.5 webapi site:

$.support.cors = true; $.ajax("http://mydomain/webapi/api/authentication/", { type: "post", data: json, contenttype: "application/json" }); 

here server method:

public class authenticationcontroller : apicontroller {      // login or logout user.     // post api/authentication login or logout data object     public httpresponsemessage post(object data)     {         return processaction(data);     } } 

i've set headers on remote server:

access-control-allow-origin: *

access-control-allow-methods: post,get, options

when execute code, 405 method not allowed - requested resource not support http method 'get'.

the method calling works fine if called same domain.

additionally, if remove contenttype: "application/json" option, 500 server error.

it appears contenttype option has problem, not sure.

any suggestions or advice appreciated!

thanks.