public override int GetHashCode() { int hash = 17; hash ^= 31 + SerialNumber.ToInt(); hash ^= 31 + DateOfIssue.ToShortDateString().ToInt(); return(hash ^ 31 + ExpiryDate.ToShortDateString().ToInt()); }
public override int GetHashCode() { int hash = 17; hash ^= 31 + SerialNumber.ToInt(); hash ^= 31 + DateOfIssue.ToShortDateString().ToInt(); return(hash ^ 31 + ExpiryDate.ToShortDateString().ToInt()); }