How to iterate on Tablix rows?

I have implemented a custom renderer for sql server 2005 in order to send direct information from a report to Microsoft Dynamics CRM. When they announced me that I have to port the solution to sql server 2008 I encountered the following problems:

1. The namespace have been changed from

Microsoft.ReportingServices.ReportRendering;

to

Microsoft.ReportingServices.OnDemandReportRendering;

2. Control Table did not exist and had been replaced with Tablix. The iteration of table rows was easy, and I have implement it like this

Table table = reportItem as Table;

for (int j = 0; j < table.DetailRows.Count; j++)

{

    TableDetailRowCollection tableDetailRow = table.DetailRows[j];

    for (int k = 0; k < tableDetailRow.Count; k++)

    {

        …

    }

}

But the Tablix control does not work like this. In order to iterate through the tablix rows I implemented the following code

Tablix table = reportItem as Tablix;                                               

int pos = -1;

foreach (TablixMember memberDef in table.RowHierarchy.MemberCollection)

{

    pos++;

    if (memberDef.IsStatic)

        continue;

    TablixDynamicMemberInstance instance = (TablixDynamicMemberInstance)memberDef.Instance;

    instance.ResetContext();

    while (instance.MoveNext())

    {

        foreach (TablixCell tableCell in table.Body.RowCollection[pos])

        {

            if (tableCell.CellContents.ReportItem is TextBox)

            {

                ...

            }

        }                               

    }

}