using System;

using System.Collections.Generic;

using System.Linq;

​

using System.Text.Json;

using System.Text.Encodings.Web;

using System.Text.Unicode;

​

public class Program

{

    public static void Main()

    {

        var options = new JsonSerializerOptions

        {

            Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping

        };

        Dictionary<string, string> spovs = new Dictionary<string, string>{ { "variant", "sr:exact_goals:5+" } };

        Console.WriteLine(JsonSerializer.Serialize(spovs, options));         

        Console.WriteLine(JsonSerializer.Serialize(spovs));      

    }

}