private void CancelEditButton_Click(object sender, EventArgs e)
{
this.EditCheckBox.AutoCheck = true;
this.EditCheckBox.Checked = false;
for (int i = this.ListsList.Items.Count - 1; i >= 0; i--)
if (this.ListsList.Items[i] is NewListElement)
this.ListsList.Items.RemoveAt(i);
this.ListsList_SelectedIndexChanged(this.ListsList, EventArgs.Empty);
}