private void btnInterjection_Click(object sender, EventArgs e)
{
// C = C.Interjection(A, B);
C = A.Interjection(B);
C.Print(lstSetC);
}
private void btnUnion_Click(object sender, EventArgs e)
{
C = C.Union(A, B);
// C = A.Union(B);
C.Print(lstSetC);
}