async_await_example.cs

private async void DoWhoisLookup()
{
    EnableInput(false);

    try
    {
        var googleWhoisLookup = new WhoisLookup(tbHostToLookup.Text);

        // initiate HTTP request asynchronously
        Task<string> getWhoisInfoTask = googleWhoisLookup.GetWhoisInformationsAsync();

        // during the HTTP download we display this state in the GUI
        DisplayMessageWithBgColor("Loading....", Color.Orange);

       // now we wait untit the download is completed
        var result = await getWhoisInfoTask;

        // and display the content
        DisplayMessageWithBgColor(result.Replace("\n", Environment.NewLine), Color.LightGreen);
    }
    catch (Exception exception)
    {
        DisplayMessageWithBgColor(exception.Message, Color.LightCoral);
    }
    finally
    {
        EnableInput(true);
    }
}