Simple 0 external dependency C# script that uses the GitHub API to fetch information about a specific repository

Program.cs

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

#nullable enable
public class GitHubApiClient
{
    public async Task<Result<Repository>> GetRepositoryInfoAsync(string owner, string repo)
    {
        using var client = new HttpClient
        {
            BaseAddress = new Uri("https://api.github.com/")
        };
        client.DefaultRequestHeaders.Add("User-Agent", "CSharpApp");

        string url = $"repos/{owner}/{repo}";
        var response = await client.GetAsync(url);

        if (response.StatusCode != System.Net.HttpStatusCode.OK)
        {
            return new Result<Repository>($"Failed to fetch data: {response.StatusCode}");
        }

        var json = await response.Content.ReadAsStringAsync();
        var repository = JsonSerializer.Deserialize<Repository>(json, new JsonSerializerOptions
        {
            PropertyNameCaseInsensitive = true,
            Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
            AllowTrailingCommas = true,
            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
            ReadCommentHandling = JsonCommentHandling.Skip
        });

        if (repository is null)
        {
            return new Result<Repository>("Deserialization resulted in null.");
        }

        return new Result<Repository>(repository);
    }
}

public record Repository
{
    public string? Name { get; init; }
    public string? Description { get; init; }
    public int Stargazers_Count { get; init; }
    public string? Default_Branch { get; init; }
}

public class Result<T> where T : class
{
    public bool IsSuccess { get; }
    public T? Value { get; }
    public string? Error { get; }

    public Result(T value)
    {
        IsSuccess = true;
        Value = value;
    }

    public Result(string error)
    {
        IsSuccess = false;
        Error = error;
    }
}

class Program
{
    static async Task Main(string[] args)
    {
        var client = new GitHubApiClient();
        var result = await client.GetRepositoryInfoAsync("dotnet", "runtime");

        if (result.IsSuccess && result.Value != null)
        {
            Console.WriteLine($"Repository: {result.Value.Name ?? "Name not available"}");
            Console.WriteLine($"Description: {result.Value.Description ?? "Description not available"}");
            Console.WriteLine($"Stars: {result.Value.Stargazers_Count}");
            Console.WriteLine($"Default Branch: {result.Value.Default_Branch ?? "Default branch not available"}");
        }
        else
        {
            Console.WriteLine($"Error: {result.Error}");
        }
    }
}
#nullable disable