public bool isLike(IPair <T> b) { return(b.NotNull() && (_p0.Equals(b.p0) && _p1.Equals(b.p1)) || (_p0.Equals(b.p1) && _p1.Equals(b.p0))); }
public bool isExact(IPair <T> b) { return(b.NotNull() && _p0.Equals(b.p0) && _p1.Equals(b.p1)); }