private void frmLineaCreditoClientes_FormClosed(object sender, FormClosedEventArgs e)
 {
     Instancia = null;
 }
 private void MenuSalir_Click(object sender, EventArgs e)
 {
     Instancia = null;
     this.Close();
 }
 private void MenuSalir_Click(object sender, EventArgs e)
 {
     Instancia = null;
     this.Close();
 }
 private void frmLineaCreditoClientes_FormClosed(object sender, FormClosedEventArgs e)
 {
     Instancia = null;
 }