如何在Twilio语音出站调用c#中传递自定义参数，然后在回调方法中获取。请给出建议

using Twilio;
using Twilio.Rest.Api.V2010.Account;
using Twilio.Types;

public class CallController : Controller
{
    public ActionResult MakeCall()
    {
        var accountSid = "your_account_sid";
        var authToken = "your_auth_token";
        TwilioClient.Init(accountSid, authToken);

        var call = CallResource.Create(
            url: new Uri("http://yourserver.com/call?customParam1=value1&customParam2=value2"),
            to: new PhoneNumber("+1234567890"),
            from: new PhoneNumber("+0987654321")
        );

        return View(call.Sid);
    }
}

public class CallBackController : Controller
{
    [HttpPost]
    public ActionResult Index(string customParam1, string customParam2)
    {
        // 处理回调逻辑
        // customParam1 和 customParam2 将包含传递的自定义参数值

        return new EmptyResult();
    }
}