Example of NewtonSoft.Json usage, JsonObject edition

JsonObjectExample.cs

using Newtonsoft.Json;

namespace JsonObjectExample
{
    [JsonObject(MemberSerialization.OptIn)]
    class UserData
    {
        [JsonProperty("username")]
        public string Username { get; set; }
        
        [JsonProperty("transactions")]
        public List<Transaction> Transactions { get; set; }
    }
    
    [JsonObject(MemberSerialization.OptIn)]
    class Transaction
    {
        [JsonProperty("type")]
        public string TransactionType { get; set; }
        
        [JsonProperty("amount")]
        public decimal Amount { get; set; }
        
        [JsonProperty("paid")]
        public bool IsPaid { get; set; }
    }
    
    class Test
    {
        public static void Main()
        {
            string jsonData = @"{
                ""username"": ""hb2"",
                ""transactions"": [
                    {
                        ""type"": ""plot"",
                        ""amount"": 66.6,
                        ""paid"": true
                    },
                    {
                        ""type"": ""print"",
                        ""amount"": 4.2,
                        ""paid"": false
                    }
                ]
            }";
            
            UserData userData = new UserData();
            using (StringReader reader = new StringReader(jsonData))
            {
                JsonSerializer.Create().Populate(reader, this);
            }
            
            // userData.Username == "hb2"
            // userData.Transactions.Count == 2
            // userData.Transactions[0].TransactionType == "plot"
            // userData.Transactions[0].Amount == 66.6m
            // userData.Transactions[0].IsPaid == true
            // userData.Transactions[1].TransactionType == "print"
            // userData.Transactions[1].Amount == 4.2m
            // userData.Transactions[1].IsPaid == false
        }
    }
}