private void con_cropAll_Click(object sender, EventArgs e)
{
var crop = new Crop(_listFramesEdit[trackBar.Value].From());
if (crop.ShowDialog(this) == DialogResult.OK)
{
ResetUndoProp();
ImageUtil.Crop(_listFramesEdit, crop.Rectangle);
pictureBitmap.Image = _listFramesEdit[trackBar.Value].From();
ResizeFormToImage();
}
crop.Dispose();
GC.Collect();
}