public override int GetHashCode() { const int prime = 31; int result = 1; result = prime * result + ((F1 == null) ? 0 : F1.GetHashCode()); result = prime * result + ((F2 == null) ? 0 : F2.GetHashCode()); result = prime * result + ((F3 == null) ? 0 : F3.GetHashCode()); return(result); }