Opc.Ua.ContentFilter.LessThanOrEqual C# (CSharp) Method

        private bool? LessThanOrEqual(FilterContext context, IFilterTarget target, ContentFilterElement element)
        {
            FilterOperand[] operands = GetOperands(element, 2);

            object lhs = GetValue(context, operands[0], target);
            object rhs = GetValue(context, operands[1], target);

            DoImplicitConversion(ref lhs, ref rhs);

            if (lhs is IComparable && rhs is IComparable)
            {
                return ((IComparable)lhs).CompareTo(rhs) <= 0;
            }

            // return null if the types are not comparable.
            return null;
        }