DOM and creating a xsi:noNamespaceSchemaLocation attribute

In my root node I want to put the attribute xsi:noNamespaceSchemaLocation so that I can get the document to validate

I want this

Code:

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

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But I keep getting this

Code:

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

---

This is what I'm doing...

Code:

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XmlDocument outputData = new XmlDocument();

XmlNode currentNode = outputData.AppendChild(outputData.CreateElement("CONTENT"));

XmlAttribute xmlAttribute = xmlNode.Attributes.Append(outputData.CreateAttribute("xsi:noNamespaceSchemaLocation"));

xmlAttribute.Value = "ContentList.xsd";

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Does anyone know what I need to do? just point me in the right direction ;)