Make sendPostFailMessage Async?

Question

Hello - how can I make this method async?

public class SendEmail
{
    public void sendPostFailMessage()
    {       var apiKey = "";

        var client = new SendGridClient(apiKey);
        var from = new EmailAddress("test123@gmail.com", "Test");
        var subject = "Error";
        var to = new EmailAddress("Test221@gmail.com", "Testtest");
        var plainTextContent = "and easy to do anywhere, even with C#";
        var htmlContent =
            "Hello, <br><br> There has been an is";
        var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, htmlContent);
        var response = client.SendEmailAsync(msg).Wait(10000);
    }
}

public class StartService : IStartService
{
    private readonly SendEmail _sendEmail;
    public async Task GenerateAndSendJson()
    {
        foreach (var item in fromDatabase)
        {
            Console.WriteLine("Sending data");
            try
            {

            }
            catch
            {
                _sendEmail.sendPostFailMessage();
                continue;
            }
        }
        Console.WriteLine("Process finish");
    }
}

Answer 1

and since I await the response in the sendPostFailMessageAsync() method, I do not need to await it in the calling method of GenerateAndSendJson()? Is that an accurate statement?

Yes. The calls must be asynchronous from bottom to top. This information is openly covered in the linked documentation.