Looks up the closest xmlns declaration for the given prefix that is in scope for the current node and returns the namespace URI in the declaration.

Standard HTML nodes will always have the default namespace to simplify XPath queries even if an xmlns is explicitely specified in XHTML documents.
For all non-standard HTML 4.01 elements that define an xmlns, NamespaceURI will return the namespace URI.

public string GetNamespaceOfPrefix(
	string prefix
)

Public Function GetNamespaceOfPrefix ( _
	prefix As String _
) As String

public:
String^ GetNamespaceOfPrefix(
	String^ prefix
)