System.Text.Json.Deserialize an array into C# class - json

Question

First off, I am working with the Google recaptcha RESTful service trying to get the JSON object into a class. With WSDL's, Visual Studio will generate all this code for you so that it is easy to work with, but RESTful it seems you have to do everything yourself, am I missing something? I am working with VS2019 and would have thought there is some way to import this stuff to make life easy. I have yet to find anything, so...
Google is returning:
{
"success": false,
"error-codes": [
"invalid-input-response",
"invalid-input-secret"
]
}
I would like to deserialize it into this:
[DataContract]
public class GoogleReCaptchaResponse
{
[DataMember(Name = "success")]
public bool Success { get; set; }
[DataMember(Name = "error-codes")]
public List<string> ErrorCodes { get; set; }
[JsonExtensionData]
public Dictionary<string, object> ExtensionData { get; set; }
}
I see the error-codes in the ExtensionData, but ErrorCodes is always null. What do I have wrong?
https://dotnetfiddle.net/RtjbwR

Answer 1

You should use JsonPropertyName attribute from System.Text.Json.Serialization namespace
using System;
using System.Collections.Generic;
using System.Text.Json.Serialization;
public class GoogleReCaptchaResponse
{
[JsonPropertyName("success")]
public bool Success { get; set; }
[JsonPropertyName("error-codes")]
public List<string> ErrorCodes { get; set; }
}
public class Program
{
public static void Main()
{
GoogleReCaptchaResponse json = System.Text.Json.JsonSerializer.Deserialize<GoogleReCaptchaResponse>("{ \"success\": false, \"error-codes\": [\"invalid-input-response\",\"invalid-input-secret\"]}");
if (json.ErrorCodes == null)
{
Console.WriteLine("no Error Codes");
}
else
{
Console.WriteLine("Error Codes!");
}
}
}