private void button2_Click(object sender, EventArgs e)
{
List <int> marked = new List <int>();
foreach (DataGridViewRow x in dataGridView1.SelectedRows)
{
marked.Add((int)x.Cells[0].Value);
}
var form = new FormCaretakers();
form.dataGridView1.DataSource = form.Dataset.Where(x => marked.Contains(x.identyfikator_dozorcy)).ToList();
form.Show();
}
private void button2_Click(object sender, EventArgs e)
{
var form = new FormCaretakers();
form.Show();
}