How to convert a C# object to a JSON string in .NET?

Hello everyone! I'm new to C# and .NET, and I have a problem. I need to send data from my desktop application to a server in JSON format. I created a simple class to store user information: ```csharp public class User { public string Name { get; set; } public int Age { get; set; } public string Email { get; set; } } ``` Then I create an object of this class and fill it with data: ```csharp User user = new User { Name = "Ivan Petrov", Age = 30, Email = "ivan@example.com" }; ``` Now I need to convert this object into a JSON string to send it via an HTTP request. I've heard that .NET has built-in tools for this, but I can't figure out how to use them correctly. I tried googling, but I find a lot of outdated