public bool Equals(AssociationRule <T> that)
 {
     if (that == null)
     {
         return(false);
     }
     if (Left.Equals(that.Left) && Right.Equals(that.Right))
     {
         return(true);
     }
     else
     {
         return(false);
     }
 }
        public override bool Equals(Object obj)
        {
            if (obj == null)
            {
                return(false);
            }
            AssociationRule <T> rule = obj as AssociationRule <T>;

            if (rule == null)
            {
                return(false);
            }
            else
            {
                return(Equals(rule));
            }
        }