private void CartiSolicitate_Click(object sender, EventArgs e) { var ctx = service.GetAllRequestedBooks(); string content = "Carti cele mai solicitate \n"; for (int index = 0; index < ctx.LongCount(); index++) { content += "\tTitlu " + (index + 1) + ": " + ctx[index] + "\n"; } MessageBox((IntPtr)0, content, "Message Box", 0); }