using System.IO;
using System.Net;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;

public class StunServer
{
    public string? Url { get; set; }
    public int Port { get; set; }

    /// <summary>
    /// Loads list of Stun Servers from a local file path.
    /// </summary>
    /// <param name="filePath">Full path to the local Stun Server list (.JSON). Example: C:\Users\Administrator\Downloads\StunServers.json</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static StunServer[]? GetStunServersFromFile(string filePath)
    {
        string _json = File.ReadAllText(filePath);
        return JsonSerializer.Deserialize<StunServer[]>(_json);
    }

    /// <summary>
    /// Loads list of Stun Servers from an HTTP/HTTPS URL.
    /// </summary>
    /// <param name="fileUrl">Full URL to the Stun Server list (.JSON). Example: "https://raw.github.com/username/repo/files/StunServers.json"</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static async Task<StunServer[]?> GetStunServersFromUrl(string fileUrl)
    {
        string _json;
        using (HttpClient _client = new())
        {
            _json = await _client.GetStringAsync(fileUrl);
        }
        return JsonSerializer.Deserialize<StunServer[]>(_json);
    }

    /// <summary>
    /// Loads list of Stun Servers from a pre-populated JSON string.
    /// </summary>
    /// <param name="json">A string, in JSON format, containing an array of Stun Server objects.</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static StunServer[]? GetStunServersFromJson(string json)
    {
        return JsonSerializer.Deserialize<StunServer[]>(json);
    }
}

// .NET Framework v4.8
// Requires Newtonsoft.Json

using System.IO;
using System.Net;
using Newtonsoft.Json;

public class StunServer
{
    public string Url { get; set; }
    public int Port { get; set; }

    /// <summary>
    /// Loads list of Stun Servers from a local file path.
    /// </summary>
    /// <param name="filePath">Full path to the local Stun Server list (.JSON). Example: C:\Users\Administrator\Downloads\StunServers.json</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static StunServer[] GetStunServersFromFile(string filePath)
    {
        string _json = System.IO.File.ReadAllText(filePath);
        return JsonConvert.DeserializeObject<StunServer[]>(_json);
    }

    /// <summary>
    /// Loads list of Stun Servers from an HTTP/HTTPS URL.
    /// </summary>
    /// <param name="fileUrl">Full URL to the Stun Server list (.JSON). Example: "https://raw.github.com/username/repo/files/StunServers.json"</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static StunServer[] GetStunServersFromUrl(string fileUrl)
    {
        string _json;
        using (System.Net.WebClient wc = new System.Net.WebClient())
        {
            _json = wc.DownloadString(fileUrl);
        }
        return JsonConvert.DeserializeObject<StunServer[]>(_json);
    }

    /// <summary>
    /// Loads list of Stun Servers from a pre-populated JSON string.
    /// </summary>
    /// <param name="json">A string, in JSON format, containing an array of Stun Server objects.</param>
    /// <returns>An array of 'StunServer' objects.</returns>
    public static StunServer[] GetStunServersFromJson(string json)
    {
        return JsonConvert.DeserializeObject<StunServer[]>(json);
    }
}

List<Tuple<string, int>> stunServers = new List<Tuple<string, int>>();
foreach (var _server in p2p.Models.StunServer.GetStunServersFromFile(@"C:\Dev\StunServers.json"))
{
    stunServers.Add(new Tuple<string, int>(_server.Url, _server.Port));
}