[HttpPost]
public ActionResult Login()
{
    var form = JsonConvert.DeserializeObject<dynamic>(new StreamReader(Request.InputStream).ReadToEnd());
    string username = form.username;
    string password = form.password;
    ....
}

x

 1

[HttpPost]

2

public ActionResult Login()

3

{

4

    var form = JsonConvert.DeserializeObject<dynamic>(new StreamReader(Request.InputStream).ReadToEnd());

5

    string username = form.username;

6

    string password = form.password;

7

    ....

8

}