.NET SignalR Console Client demo

using Microsoft.AspNetCore.SignalR.Client;

HubConnection connection = new HubConnectionBuilder()
                .WithUrl("http://localhost:44394/hub/chat", options =>
                {
                    options.AccessTokenProvider = async () =>
                    {
                        var accessToken = await File.ReadAllTextAsync("accessToken.txt");
                        return accessToken;
                    };
                })
                .WithAutomaticReconnect()
                .Build();

connection.Closed += async (error) =>
{
    Console.WriteLine("Connection closed...");
    await Task.Delay(new Random().Next(0, 5) * 1000);
    await connection.StartAsync();
    Console.WriteLine("Connected to server successfully");
};
connection.Reconnecting += error =>
{
    if (connection.State == HubConnectionState.Reconnecting)
    {
        Console.WriteLine("Reconnecting...");
    }
    return Task.CompletedTask;
};
connection.Reconnected += str =>
{
    Console.WriteLine("Reconnect to server successfully...");
    return Task.CompletedTask;
};
connection.On("ReceiveMessage", (user, message) =>
{
    Console.WriteLine($"ReceiveMessage from {user}: {message}");
});

await connection.StartAsync();
Console.WriteLine("Connected to server successfully");

ConsoleKeyInfo key = Console.ReadKey(true);
do
{
    key = Console.ReadKey();
} while (key.Key is not ConsoleKey.Q);