Rubberduck.Parsing.Preprocessing.LogicalLessThanExpression.Evaluate C# (CSharp) Method

        public override IValue Evaluate()
        {
            var left = _left.Evaluate();
            var right = _right.Evaluate();
            if (left == null || right == null)
            {
                return null;
            }
            if ((left.ValueType == ValueType.String || left.ValueType == ValueType.Empty)
                && (right.ValueType == ValueType.String || right.ValueType == ValueType.Empty))
            {
                var leftValue = left.AsString;
                var rightValue = right.AsString;
                return new BoolValue(leftValue.CompareTo(rightValue) < 0);
            }
            else
            {
                var leftValue = left.AsDecimal;
                var rightValue = right.AsDecimal;
                return new BoolValue(leftValue < rightValue);
            }
        }
    }