Call rest API from C# client

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C#

JSON

REST

I have a rest API, returns JSON response.
I have to call this rest API from web application.

it's quite easy to develop
But, I want the simplest way to call this rest url.


Url :

billing/customerDetails/{Cid}/billarrangement/{aId}/bill/{bId}/getbillSummary

Method: GET

example URL :

billing/customerDetails/52145879/billarrangement/1234569/bill/9879/getbillSummary?uan=5214789635

What I have tried:

string reqUrl = string.Format("billing/customerDetails/{0}/billarrangement/{1}/bill/{2}getbillSummary?uan={3}", cID, aNo, bId, UAN);

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "GET";
req.Credentials = CredentialCache.DefaultCredentials;
req.Accept = "text/json";

using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse())
{
      if (resp.StatusCode == HttpStatusCode.OK)
      {
        // my code
      }
}

I want to know if this one is simplest.
Or if anything wrong, please correct me.
If its not simplest, please help me with that.