using System;

using Newtonsoft.Json;          

public class Sample

    {

        public string? TopColor { get; set; }

        public string? BottomColor { get; set; }

        public string? LeftColor { get; set; }

        public string? RightColor { get; set; }

        public string? TopStyle { get; set; }

        public string? BottomStyle { get; set; }

        public string? LeftStyle { get; set; }

        public string? RightStyle { get; set; }

        public string? TopWidth { get; set; }

        public string? BottomWidth { get; set; }

        public string? LeftWidth { get; set; }

        public string? RightWidth { get; set; }

        public string? TopLeftRadius { get; set; }

        public string? TopRightRadius { get; set; }

        public string? BottomLeftRadius { get; set; }

        public string? BottomRightRadius { get; set; }

​

    }

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(JsonConvert.SerializeObject(new Sample()));

    }

}