Jokes.cs

#nullable enable

using System;
using System.Net.Http;
using System.Net.Http.Json;
using System.Text.Json;

JsonSerializerOptions _options = new()
{
    PropertyNameCaseInsensitive = true
};

using HttpClient httpClient = new();

// An array with a single joke is returned
Joke[]? jokes = await httpClient.GetFromJsonAsync<Joke[]>(
	"https://official-joke-api.appspot.com/jokes/programming/random", _options);

Joke? joke = jokes?[0];

string text = joke is not null
	? $"{joke.Setup}{Environment.NewLine}{joke.Punchline}"
	: "No joke here...";

Console.WriteLine(text);

public record Joke(int Id, string Type, string Setup, string Punchline);

Here is the .NET fiddle with this running - enjoy 🎉