How to get Telegram dialog icons as remote URLs using WTelegramClient (C#)

I'm using the WTelegramClient library in a .NET application to load all my Telegram dialogs and their recent messages. I want to get the avatar (profile picture) of each dialog as a remote Uri, not download files to disk. This is to display user/chat icons in a UI via HTTP without local storage.

Here’s the relevant part of my current code:

protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
    var user = await _client.LoginUserIfNeeded();
    Console.WriteLine($"Logged in as {user.username ?? user.first_name}");

    var dialogs = await _client.Messages_GetAllDialogs();

    var scope = _services.CreateScope();
    var store = scope.ServiceProvider.GetRequiredService<IMessageStore>();

    foreach (var chatBase in dialogs.chats.Values.OfType<Chat>())
        await store.AddOrUpdateChatAsync(chatBase);

    foreach (var usr in dialogs.users.Values.OfType<User>())
        await store.AddOrUpdateUserAsync(usr);

    var dialogsFiltered = dialogs.dialogs.OfType<Dialog>().ToList();

    foreach (var dlg in dialogsFiltered)
    {
        InputPeer peer = null!;

        if (dialogs.chats.TryGetValue(dlg.peer.ID, out var chatPeer))
            peer = chatPeer;
        else if (dialogs.users.TryGetValue(dlg.peer.ID, out var usrObj))
            peer = new InputPeerUser(dlg.peer.ID, usrObj.access_hash);

        if (peer is null) continue;

        var history = await _client.Messages_GetHistory(peer, limit: 50);
        foreach (var msg in history.Messages.OfType<Message>())
            await store.SaveOrUpdateMessageAsync(msg);

        // Here's where I want to get the dialog icon URI
    }

    await Task.Delay(Timeout.Infinite, stoppingToken);
}

Question: Is there a way to get a remote URL or public URI for a user's or chat's avatar (like https://t.me/i/userpic/...) using WTelegramClient, instead of downloading and serving them myself?

If this is not possible directly, is there a workaround to show user/chat avatars in a web UI without saving them locally?

I tried using this method to download profile pictures, but it saves them as local files instead of giving me any usable Uri:

private async Task<string?> GetAvatarUriAsync(IPeerInfo peer)
{
    try
    {
        var peerName = peer switch
        {
            User u => $"{u.id}",
            ChatBase c => $"{c.ID}",
            _ => null
        };

        if (peerName == null) return null;

        var avatarDir = Path.Combine(Directory.GetCurrentDirectory(), "avatars");
        Directory.CreateDirectory(avatarDir);

        var fileName = $"{peerName}.jpg";
        var fullPath = Path.Combine(avatarDir, fileName);

        var stream = new FileStream(fullPath, FileMode.Create);
        var avatarStream = await _client.DownloadProfilePhotoAsync(peer, stream, true);
        stream.Close();
        stream.Dispose();
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Avatar download failed: {ex.Message}");
    }
    return null;
}

Answer

It's not possible.
As Telegram is a secure & encrypted messenger, all media & data stored in Telegram is inaccessible from normal web access.

The only exception is a public preview for some public channels via URLs like https://t.me/s/ProxyMTProto

With WTelegramClient, you can download media to memory (via MemoryStream) if you don't want to save them to disk