private void cargarToolStripMenuItem_Click(object sender, EventArgs e)
{
guardarToolStripMenuItem1.PerformClick();
OpenFileDialog openFile = new OpenFileDialog();
if (openFile.ShowDialog() == DialogResult.OK)
{
FileStream backup = new FileStream(openFile.FileName, FileMode.Open);
biblioteca = (Biblioteca)bin.Deserialize(backup);
}
CargarListView();
}