<webservices>
    <protocols>
        <remove name="HttpPost" />
        <remove name="HttpGet" />
    </protocols>
</webservices>

namespace ChattyService {
  public class ChattyService : WebService {
    private string username;
    private string password;

    public string Username {
      [WebMethod]
      set {
        username = Username;
    } }

    public string Password {
      [WebMethod]
      set {
        password = Password;
      } }

    [WebMethod]
    public bool Logon() {
      // 验证身份
      return true;
    }
  }
}

namespace ChattyService {
  public class ChattyService : WebService {
    [WebMethod]
    public bool Logon(string Username, string Password) {
      // 验证身份
      return true;
    }
  }
}