private void buttonChange_Click(object sender, EventArgs e)
{
try
{
FormChangeBookExemplar newForm =
new FormChangeBookExemplar(Int32.Parse(dataGridViewBE.CurrentRow.Cells[0].Value.ToString()));
newForm.ParentBookExemplar = this;
newForm.Show();
Hide();
}
catch (NullReferenceException)
{
MessageBox.Show("Строка не выбрана");
}
}
