private void ModifyButton_Click(object sender, EventArgs e)
{
int index = dataGridView1.SelectedCells[0].RowIndex;
var form = new AddForm
{
CoordinateCalculation = Motions[index]
};
if (form.ShowDialog() == DialogResult.OK)
{
iMotionBindingSource.RemoveAt(index);
iMotionBindingSource.Insert(index, form.CoordinateCalculation);
}
}