How to Save Large Json Data?

Question

i have a large ObservableCollection that I want to get out as Json file. I used the following code, But I get an error out of memory

string json = JsonConvert.SerializeObject(content, Formatting.Indented);
await File.WriteAllTextAsync("file.json");

How can I save this huge ObservableCollection in a json file?

Answer 1

Instead of serializing to a string, and then writing the string to a stream, stream it directly:

using var stream = File.Create("file.json");
JsonSerializer.Serialize(stream, content, new JsonSerializerOptions
{
    WriteIdented = true 
});