Json serialize and deserialize in C#

Serializing objects is converting an object into a stream of bytes. The goal is to store or transmit the data. This article will teach you how to serialize C# objects to JSON string. We will learn how to convert an object into a JSON string through the JsonConvert class.

First create a simple class we will be using to serialize & deserialize:

public class Item{    public int Id { get; set; }    public string Description { get; set; }    public string Name { get; set; }}

Next we create a class that will be using the JsonNamingPolicy:

public class ToLowerCasingPolicy : JsonNamingPolicy{    public override string ConvertName(string name)    {        return name.ToLower();    }}

This Policy can be used very easy:

var options = new JsonSerializerOptions{    PropertyNamingPolicy = new ToLowerCasingPolicy(),    WriteIndented = true};
var item = new Item{    Name = "Test",    Description = "Test description",    Id = 1};
var itemJsonString =  JsonSerializer.Serialize(item, options);Console.WriteLine(itemJsonString);
var backToItem = JsonSerializer.Deserialize<Item>(itemJsonString, options);

Output from the itemJsonString:

{"id": 1,"description": "Test description","name": "Test"}