NLog.Conditions.ConditionRelationalExpression.Compare C# (CSharp) Méthode

        private static object Compare(object leftValue, object rightValue, ConditionRelationalOperator relationalOperator)
        {
#if NETFX_CORE
            StringComparer comparer = StringComparer.Ordinal;
            PromoteTypes(ref leftValue, ref rightValue);
            string leftValueText = leftValue.ToString();
            string rightValueText = rightValue.ToString();
#else
            StringComparer comparer = StringComparer.InvariantCulture;
            PromoteTypes(ref leftValue, ref rightValue);
            var leftValueText = leftValue;
            var rightValueText = rightValue;
#endif




            switch (relationalOperator)
            {
                case ConditionRelationalOperator.Equal:
                    return comparer.Compare(leftValueText, rightValueText) == 0;

                case ConditionRelationalOperator.NotEqual:
                    return comparer.Compare(leftValueText, rightValueText) != 0;

                case ConditionRelationalOperator.Greater:
                    return comparer.Compare(leftValueText, rightValueText) > 0;

                case ConditionRelationalOperator.GreaterOrEqual:
                    return comparer.Compare(leftValueText, rightValueText) >= 0;

                case ConditionRelationalOperator.LessOrEqual:
                    return comparer.Compare(leftValueText, rightValueText) <= 0;

                case ConditionRelationalOperator.Less:
                    return comparer.Compare(leftValueText, rightValueText) < 0;

                default:
                    throw new NotSupportedException("Relational operator " + relationalOperator + " is not supported.");
            }
        }