Error on user taks: The type or namespace name 'Linq' does not exist in the namespace 'Newtonsoft.Json'

Hello Chani,

The reason of this error can be the fact that Newtonsoft.Json version that you use in your package is too old. The Linq namespace (which contains JObject, JArray, etc.) was introduced in Newtonsoft.Json 4.5 and later. 

As an alternative solution you can update your code the way that Newtonsoft.Json.Linq will not be necessary for implementing your functionality. You use JObject, JArray from Newtonsoft.Json.Linq to deserialize the response you get from the endpoint. Instead of using them you can create the model to represent the response structure. It will look as following:

public class GeocodeResponse
{
	public List<Result> results { get; set; }
	public string status { get; set; }
}
public class Result
{
	public List<AddressComponent> address_components { get; set; }
	public string formatted_address { get; set; }
	public Geometry geometry { get; set; }
	public string place_id { get; set; }
	public PlusCode plus_code { get; set; }
	public List<string> types { get; set; }
}
public class AddressComponent
{
	public string long_name { get; set; }
	public string short_name { get; set; }
	public List<string> types { get; set; }
}
public class Geometry
{
	public Location location { get; set; }
	public string location_type { get; set; }
	public Viewport viewport { get; set; }
}
public class Location
{
	public double lat { get; set; }
	public double lng { get; set; }
}
public class Viewport
{
	public Location northeast { get; set; }
	public Location southwest { get; set; }
}
public class PlusCode
{
	public string compound_code { get; set; }
	public string global_code { get; set; }
}

Then InternalExecute method in the user task will look like this:

protected override bool InternalExecute(ProcessExecutingContext context)
{
	string apiKey = "AIzaSyAxzbYu2BXF7bX0Y37H2ofAQmGfz9KNZJA";
	string fullAddress = Get<string>("fullAddress");
	string encodedAddress = Uri.EscapeDataString(fullAddress);
	string url = $"https://maps.googleapis.com/maps/api/geocode/json?address={encodedAddress}&key={apiKey}";
 
	var request = WebRequest.Create(url);
	using (var response = request.GetResponse())
	using (var stream = response.GetResponseStream())
	using (var reader = new StreamReader(stream))
	{
		var json = reader.ReadToEnd();
 
		var jsonObj = JsonConvert.DeserializeObject<GeocodeResponse>(json);
 
		var results = jsonObj.results;
		if (results != null && results.Count > 0)
		{
			var location = results[0].geometry.location;
			double lat = location.lat;
			double lng = location.lng;
 
			Set<double>("lat", lat);
			Set<double>("lng", lng);
		}
		else
		{
			throw new Exception("No results returned from geocoding API.");
		}
	}
	return true;
}

Iryna Oriyenko,

Thank you for your answer! I'm wondering if that's realt the reason as I used linq in a business process and it was working. 

Anyway, where should I add the response structure, can it be added to the user task code itself?