schedule a message in csharp

main.cs
using System;
using System.Threading;

public class Program
{
    private static Timer timer;

    public static void Main()
    {
        // Create the timer with a callback function that sends the message
        timer = new Timer(TimerCallback, null, TimeSpan.FromMinutes(1), Timeout.InfiniteTimeSpan);

        // Run other code or wait for the message to be sent
        Console.WriteLine("The message will be sent in 1 minute.");
        Console.ReadLine();
    }

    private static async void TimerCallback(object state)
    {
        try
        {
            // Simulate sending the message asynchronously
            Console.WriteLine("Sending message...");
            await SendAsync("Hello, world!");
            Console.WriteLine("Message sent.");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error sending message: {ex.Message}");
        }
        finally
        {
            // Start the timer again to schedule the next message
            timer.Change(TimeSpan.FromMinutes(1), Timeout.InfiniteTimeSpan);
        }
    }

    private static Task SendAsync(string message)
    {
        // Simulate sending the message asynchronously
        return Task.Delay(TimeSpan.FromSeconds(5));
    }
}
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