How to ignore null properties when serializing JSON in C# using Json.NET

Hi everyone! I'm new to C# and working with the Json.NET library (Newtonsoft.Json). I have a class that I'm serializing to JSON, but some properties can be null. The problem is that during serialization, null values still end up in the resulting JSON, making it very bulky. For example, I have this class: ```csharp public class User { public string Name { get; set; } public string Email { get; set; } public string Phone { get; set; } public string Address { get; set; } } ``` And I create an object where Phone and Address are null: ```csharp var user = new User { Name = "Ivan", Email = "ivan@example.com", Phone = null, Address = null }; string json = JsonConvert.SerializeObject(user); Console.WriteLine(json); ``` In the re