private async void btnAdd_Click(object sender, EventArgs e)
{
var frm = new frmNotationDetails();
frm.ShowDialog();
await loadNotations();
}
private async void DgvNotations_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
int id = int.Parse(dgvNotations.SelectedRows[0].Cells["Id"].Value.ToString());
var frm = new frmNotationDetails(id);
frm.ShowDialog();
await loadNotations();
}