private void buttonRemoveCollection_Click(object sender, EventArgs e)
{
if (listViewMarkCollections.SelectedItems.Count > 0) {
foreach (ListViewItem item in listViewMarkCollections.SelectedItems) {
MarkCollection mc = item.Tag as MarkCollection;
MarkCollections.Remove(mc);
}
}
if (!MarkCollections.Contains(_displayedCollection)) {
PopulateFormWithMarkCollection(null);
}
PopulateMarkCollectionsList();
}