private void BackClick(object e)
{
if (history.Count != 0)
{
history.Pop();
}
graff.BackStep();
listNode = graff.GetVarians();
ContinueClick(e);
}
public Сategories(Graff graff)
{
this.graff = graff;
listNode = graff.GetVarians();
CreateWorkButton();
InitializeComponent();
}