So I finally sat down and decided to figure out what all of the numbers are for the DelimiterSetSerializedData attribute in the X12InterchangeXml rood node.
<ins0:X12InterchangeXml DelimiterSetSerializedData="126:13:10:42:58:-1:-1:-1:-1" xmlns:ins0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006/InterchangeXML">

So the values are for the
- segment delimiter:126+13+10=~<CR><LF>
- element delimiter:42=*
- sub-element delimiter:58=:
If there aren’t any values, you simply need to put –1 in the stream, example
<ins0:X12InterchangeXml DelimiterSetSerializedData="126:-1:-1:42:58:-1:-1:-1:-1" xmlns:ins0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006/InterchangeXML">