Wrong output in json file from Dictionary<string, int> C#

Question

I am trying to write a dictionary to json file from C#, but the output is wrong, here is my method

public static List<Dictionary<string, int>> CreateGlobalVectorAndRareVectors(List<Article> articleList)
        {
            List<Dictionary<string, int>> vectoriRari = new List<Dictionary<string, int>>();


            int i = 0;
            foreach (Article art in articleList)
            {
                
                Dictionary<string, int> aux = new Dictionary<string, int>();
                string[] title = art.Title1.Split(delimiterChars);
                string[] text = art.Text1.Split(delimiterChars);
                string[] completeText = title.Concat(text).ToArray();
                completeText = completeText.Where(x => !string.IsNullOrEmpty(x)).ToArray();

                foreach (var word in completeText)
                {
                    if (!aux.ContainsKey(word))
                    {
                        aux.Add(word, 1);
                    }
                    else
                    {
                        aux.TryGetValue(word, out int tempValue);
                        aux[word] = tempValue + 1;
                    }
                }
                string json = JsonConvert.SerializeObject(aux);
                using (StreamWriter sw = File.CreateText(@".\..\..\..\OutputData\" + art.FileNames[i] + ".json"))
                {
                    JsonSerializer serializer = new JsonSerializer();
                    serializer.Serialize(sw, json);
                }

                i++;

                vectoriRari.Add(aux);
            }


            return vectoriRari;
        }

Here is the output I want to get

{
    "USA": 1,
    "Microsoft": 1,
    "sees": 1
}

And this is the output I get

{
    \"USA\": 1,
    \"Microsoft\": 1,
    \"sees\": 1
}

The question is how do I get rid of \\ ? I am using the Newtonsoft.Json library for formating the json files.

Answer 1

You're serializing it twice:

string json = JsonConvert.SerializeObject(aux);
using (StreamWriter sw = File.CreateText(@".\..\..\..\OutputData\" + art.FileNames[i] + ".json"))
{
    JsonSerializer serializer = new JsonSerializer();
    serializer.Serialize(sw, json);
}

You've already got JSON from the first line - you're then encoding that JSON as a JSON string in the Serialize call later.

You can make this much simpler:

string json = JsonConvert.SerializeObject(aux);
// TODO: Consider using Path.Combine instead
string path = @"..\..\..\OutputData\" + art.FileNames[i] + ".json";
File.WriteAllText(path, json);