How do I save a JSON file with four spaces indentation using JSON.NET?

Question

I need to read a JSON configuration file, modify a value and then save the modified JSON back to the file again. The JSON is as simple as it gets:

{
    "         


        

Answer 1

The problem is that you are using config.ToString(), so the object is already serialised into a string and formatted when you write it using the JsonTextWriter.

Use a serialiser to serialise the object to the writer instead:

JsonSerializer serializer = new JsonSerializer();
serializer.Serialize(jw, config);