private bool CalculatePropertyValues(JsonWriter writer, object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, out JsonContract memberContract, out object memberValue)
        {
            if (!property.Ignored && property.Readable && ShouldSerialize(writer, property, value) && IsSpecified(writer, property, value))
            {
                if (property.PropertyContract == null)
                    property.PropertyContract = Serializer._contractResolver.ResolveContract(property.PropertyType);

                memberValue = property.ValueProvider.GetValue(value);
                memberContract = (property.PropertyContract.IsSealed) ? property.PropertyContract : GetContractSafe(memberValue);

                if (ShouldWriteProperty(memberValue, property))
                {
                    if (ShouldWriteReference(memberValue, property, memberContract, contract, member))
                    {
                        property.WritePropertyName(writer);
                        WriteReference(writer, memberValue);
                        return false;
                    }

                    if (!CheckForCircularReference(writer, memberValue, property, memberContract, contract, member))
                        return false;

                    if (memberValue == null)
                    {
                        JsonObjectContract objectContract = contract as JsonObjectContract;
                        Required resolvedRequired = property._required ?? ((objectContract != null) ? objectContract.ItemRequired : null) ?? Required.Default;
                        if (resolvedRequired == Required.Always)
                            throw JsonSerializationException.Create(null, writer.ContainerPath, "Cannot write a null value for property '{0}'. Property requires a value.".FormatWith(CultureInfo.InvariantCulture, property.PropertyName), null);
                    }

                    return true;
                }
            }

            memberContract = null;
            memberValue = null;
            return false;
        }