Public Shared Function Parse ( _
    xamlText As String _
) As Object

Dim xamlText As String
Dim returnValue As Object

returnValue = XamlReader.Parse(xamlText)

public static Object Parse(
    string xamlText
)

public:
static Object^ Parse(
    String^ xamlText
)

public static function Parse(
    xamlText : String
) : Object

You cannot use methods in XAML.