trying to get a list of dates, I need to add 2 strings in between the URL 

1. Cant concatenate the URL right
2. Need help deserializing into a DateTime list 

```
public async Task<List<DateTime>>GetDate()
{
 // Original Url  http://local:8796550/serv/newobj/v678/object/35b724c5424/serv/addIDinhere/dates .    
    List<DateTime> dates = new List<DateTime>();

    var Id= "xxxxxxxxxxxxxxhola57a";
    var Uri = "http://local:8796550/serv/newobj/v678/object/35b724c5424/serv/";
    var Date="/dates";
    var client = new HttpClient();
    var ServicesDateRequest = await client.GetAsync($"{Uri}&={Id}&={Date}");
    string oj = await ServicesDateRequest.Content.ReadAsStringAsync();
    //here deserialized it into datetime list 
    var DatesJson = JsonConvert.DeserializeObject<dates>(oj);

  return dates;

}

```