Web Service Method that returns an XmlNode has invalid XML characters

I have a vb.net web method that returns an XML node that is generated via serialization, but somehow still contains characters that are invalid in XML.  If you make a soap call, you get the XML data, but if you attempt to load this XML into an XML Doc it will throw an error about invalid characters.

I imagine that there is some type of encoding that I am missing, but I am perplexed as to how they are even able to be loaded into an XML node before being returned.

The serialization is happening via System.Xml.Serialization.XmlSerializer.Serialize.  Below is a short sample of the serialization and the response of the web method.
Dim lobjCompanyInformationStream As New MemoryStream
Dim lobjSerializeCompanyInformation As XmlSerializer = New XmlSerializer(GetType(abc.CompanyInformation.Response))
Dim lobjXmlNameSpace As New XmlSerializerNamespaces
lobjXmlNameSpace.Add("", "")

lobjSerializeCompanyInformation.Serialize(lobjCompanyInformationStream, lobjResponse, lobjXmlNameSpace)
lobjCompanyInformationStream.Position = 0
lobjCompanyInformationXmlDoc.Load(lobjCompanyInformationStream)

Dim lobjNameSpaceManager As New XmlNamespaceManager(lobjCompanyInformationXmlDoc.NameTable)
lobjNameSpaceManager.AddNamespace(abcNameSpace.abc_NameSpace_abcXMLRootNode_Prefix, abcNameSpace.abc_NameSpace_CompanyInformation_v2)

Return lobjCompanyInformationXmlDoc.SelectSingleNode("//" & abcNameSpace.abc_NameSpace_abcXMLRootNode_Prefix & ":" & NODENAME_RESPONSEROOT, lobjNameSpaceManager)

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StarbucksDrinkerAsked:
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käµfm³d 👽Commented:
Have you tried inspecting the XML just prior to loading it into the
XmlDocument

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? What type of object are you loading from:  string, XmlReader, etc.?
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StarbucksDrinkerAuthor Commented:
Was not able to find a resolution to this issue and had to go about a different approach.
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käµfm³d 👽Commented:
It generally helps if you respond to questions that are asked. We cannot help you if we don't understand your environment  : \
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StarbucksDrinkerAuthor Commented:
No other solution was found
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