public override int GetHashCode()
 {
     unchecked
     {
         var hashCode = ProductId.GetHashCode();
         hashCode = (hashCode * 397) ^ (ProductName != null ? StringComparer.OrdinalIgnoreCase.GetHashCode(ProductName) : 0);
         hashCode = (hashCode * 397) ^ (ProductMark != null ? StringComparer.OrdinalIgnoreCase.GetHashCode(ProductMark) : 0);
         hashCode = (hashCode * 397) ^ Kc.GetHashCode();
         hashCode = (hashCode * 397) ^ Uch.GetHashCode();
         hashCode = (hashCode * 397) ^ Vstk.GetHashCode();
         hashCode = (hashCode * 397) ^ Rstk.GetHashCode();
         hashCode = (hashCode * 397) ^ Premper.GetHashCode();
         hashCode = (hashCode * 397) ^ Nadb.GetHashCode();
         hashCode = (hashCode * 397) ^ Prtnorm.GetHashCode();
         return(hashCode);
     }
 }