how to send email notification in C#.net core rest service.cs file code example

Example: asp net core send email async

public interface IEmailSender
{
    Task SendEmailAsync(string email, string subject, string message);
}

public class EmailSender : IEmailSender
{
    public Task SendEmailAsync(string email, string subject, string message)
    {
        return Task.CompletedTask;
    }
}