c# - How to fix missing namespace prefix in XML

Question

I have an XML file which I can't modify by myself. It contains the following root element:

<foo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" noNamespaceSchemaLocation="some.xsd">

As you can see the prefix xsi: is missing for noNamespaceSchemaLocation. This causes the XmlReader to not find the schema information while validating. If I add the prefix all is good. But as I said I can't modify the XML file (besides testing). I get them from an external source and my tool should automatically validate them.

Is there a possibility to make the XmlReader interpret noNamespaceSchemaLocation without the xsi: prefix? I don't want to add the prefix inside the XML in a preprocessing step or something like that as the sources should exactly remain as they are.

Answer 1

The XML is wrong and you need to fix it. Either get your supplier to improve the quality of what they send, or repair it on arrival.

I don't know why you want to retain the broken source (all quality standards say that's bad practice), but it's certainly possible to keep the broken original as well as the repaired version.