C#

// Add any attachments from the product web page
if (message.FilePath != null )
{
    using (var fileStream = File.OpenRead(message.FilePath))
    {
        var attach = new Attachment(fileStream, message.FilePath);
        mailMessage.Attachments.Add(attach);
        await fileStream.FlushAsync();
    }
}

// Load the SMTP Credentials                
using (var smtpClient = SendEngineAsync.Create_SMTPClient(smtpC))
{
    // Fire the send engine async
    var result = await SendEngineAsync.SendEmailAsync(smtpClient, mailMessage, 5);
    SendEngineAsync.ProcessSendResult(resend, result);
}

public partial class CreateQuotationForm : UserControl
{
    private readonly string _quotationId = ObjectId.GenerateNewId().ToString();
    private ImageList _imageListSmall;
    private ImageList _imageListLarge;
    private List<QUOTATION_ITEMS> _quotationItems;

    public delegate void SaveClickEventHandler(object sender, EventArgs e);
    private SaveClickEventHandler saveClick;
    public event SaveClickEventHandler SaveClick
    {
        add { saveClick += value; }
        remove { saveClick -= value; }
    }

private void OK_Button_Click(object sender, EventArgs e)
{            
   //Pass the click
}

private void LoadPlugins()
{
    var pluginPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase);
    var directoryCatalog = new DirectoryCatalog(pluginPath);
    var container = new CompositionContainer(directoryCatalog);
    // Problem: This syntax required the interface to be compiled into this app
    var plugins = container.GetExportedValues<ISomeInterface>();    
}

When I put a control( for example a textbox) into the application form's environment from the Toolbox Visual 2010 component inside the code environment but it does not recognize that control inside the code environment But yesterday it recognized that. :wtf: