How to turn an object into a JSON string in C#?

A JSON serializer is available in the System.Text.Json namespace. It's included in the .NET Core shared framework. Here is an example


var obj = new Person
{
    FirstName = "Sander",
    LastName = "Chaney",
    Email = "schaney@gmail.com",
    DateOfBirth = new MyDate
    {
        Year = 1988,
        Month = 4,
        Day = 30
    }
};

var json = JsonSerializer.Serialize(obj);
Console.WriteLine(json);

You can also achieve this by using Newtonsoft.Json. Install Newtonsoft.Json from NuGet and then:


var obj = new Person
{
    FirstName = "Sander",
    LastName = "Chaney",
    Email = "schaney@gmail.com",
    DateOfBirth = new MyDate
    {
        Year = 1988,
        Month = 4,
        Day = 30
    }
};

var json = Newtonsoft.Json.JsonConvert.SerializeObject(obj);
Console.WriteLine(json);

Jack Poorte

Last updated on Sep 30, 2023