private void CambiarTituloDeVentana()
{
if (InvokeRequired)
{
Invoke(new Action(() => tabControl1.SelectedTab.Text = Busqueda));
}
Mutex mutex = new Mutex();
mutex.WaitOne();
Thread.Sleep(50);
BusquedaEcha = false;
Historial historial = new Historial();
historial.DirecionWEB = Busqueda;
historial.Fecha = DateTime.Now;
ListaHistorial.Add(historial);
ListaHistorial.Count();
Busqueda = "";
Thread.Sleep(50);
mutex.ReleaseMutex();
}
