Need to show the createdDatetime and ShippingDateRequested from SalesTable with channel's time zone applied in a view in RetailSDK

[RethaLam]

I use the XML format, not Json.
If I look at RetailTransactionServiceTransactions on how it populates the XML and use the same logic to get the ShippingDateRequested and the CreatedDatetime, then the XML looks like it is created correctly.
E.g.
RetailTransactionServiceUtilities::dateToDateTimeStringWithOffset(_salesTable.ReceiptDateRequested, _rsqTable.RetailChannel)
RetailTransactionServiceUtilities::utcDateTimeToDateTimeStringWithOffset(_salesTable.CreatedDateTime)

However I cannot find on the CRT side how this XML-string is deserialized and put in a data entity.
When I run my XML-string through the parser and "roXml = (ArrayOfSalesOrderROXml)serializer.Deserialize(memoryStream);" I get the error that the XML is not correctly formed.
And it has to do with "setAttribute('xmlns', RetailTransactionServiceUtilities::getCrtDataModelXmlNamespace())" in my XML-string.
So how should I create the class ArrayOfSalesOrderROXml into which the XML-string is deserialized to accommodate for the datetimeOffset? I can't find an example of it. GetFulfillmentLines returns an XML-string but I can't find the CRT code that actually deserialize it and put it in the Commerce Entity FulFillmentLines.

Any suggestions are much appreciated.

[RethaLam]

I was able to get this to work by not following RetailTransactionServiceUtilities.
I did the following instead:

Assign the following to the dataElement, so it gets into the XML as a string with the channel timezone already applied: DateTimeUtil::toStr(this.ConvertToUTCDateTimeChannelTimeZone(_salesTable.ShippingDateRequested, _rsoTable.RetailChannel))
where:

public utcdatetime ConvertToUTCDateTimeChannelTimeZone(ValidFromDate _date, RefRecId _channelId)
{
RetailChannelTable currentChannel;
utcdatetime convertedUtcDateTime;
Timezone tz;

    select ChannelTimeZone
        from currentChannel
        where currentChannel.RecId == _channelId;
    tz = currentChannel.ChannelTimeZone;
    convertedUtcDateTime = Global::datetobeginUtcDateTime(_date, tz);
    return convertedUtcDateTime;
}

I used the same on the CreatedDatetime to assign a string to the element CreatedDateElementName:
DateTimeUtil::toStr(this.getCreatedDateChannelTimeZone(_salesTable.CreatedDateTime, _rsoTable.RetailChannel))

On the CRT side the requested delivery date is defined as the following on my CommerceEntity:
[DataMember]
[RequiredToBeUtc(false)]
public DateTimeOffset? RequestedDeliveryDate { get; set; }

[DataMember]
[RequiredToBeUtc(false)]
public DateTimeOffset CreatedDateTime { get; set; }

Then it is assigned to the commerce entity in the CRT using DateTimeOffset.Parse.