How I can take a string from a txtbox which is autocompleted and then send it to another form?
The value I need to send is txtClient.Text = (value != null) ? value.Desc : string.Empty;

 private List<String> _clienteString;
 private Marcas _clienteSeleccionado;

 public delegate void ClienteSeleccionadoHandler(object sender, EventArgs e);
 public event ClienteSeleccionadoHandler CambioClienteSeleccionado;


 public UCBusqCliente()
 {
     InitializeComponent();
 }

 public Marcas Cliente
 {
     get
     {
         if (!string.IsNullOrEmpty(txtCliente.Text.Trim()))
             _clienteSeleccionado = Cache.Clientes().Where(c => c.Desc.Equals(txtCliente.Text)).FirstOrDefault();
         else _clienteSeleccionado = null;
     
         return _clienteSeleccionado;
     }
     set
     {
         _clienteSeleccionado = value;
         txtCliente.Text = (value != null) ? value.Desc : string.Empty;
       
     }
 }
 #endregion

 private void UCBusqCliente_Load(object sender, EventArgs e)
 {
     if (!DesignMode)
     {
         _clienteString = (from c in Cache.Clientes() select c.Desc).ToList();

         txtCliente.AutoCompleteList = _clienteString;
     }
 }

I have tried to read the txtbox as a string but I get an empty value: string value = txtClient.Customer.ToString();