Public Shared Function CreateBitmapSourceFromMemorySection ( _
    section As IntPtr, _
    pixelWidth As Integer, _
    pixelHeight As Integer, _
    format As PixelFormat, _
    stride As Integer, _
    offset As Integer _
) As BitmapSource

Dim section As IntPtr
Dim pixelWidth As Integer
Dim pixelHeight As Integer
Dim format As PixelFormat
Dim stride As Integer
Dim offset As Integer
Dim returnValue As BitmapSource

returnValue = Imaging.CreateBitmapSourceFromMemorySection(section, _
    pixelWidth, pixelHeight, format, _
    stride, offset)

public static BitmapSource CreateBitmapSourceFromMemorySection(
    IntPtr section,
    int pixelWidth,
    int pixelHeight,
    PixelFormat format,
    int stride,
    int offset
)

public:
static BitmapSource^ CreateBitmapSourceFromMemorySection(
    IntPtr section, 
    int pixelWidth, 
    int pixelHeight, 
    PixelFormat format, 
    int stride, 
    int offset
)

public static function CreateBitmapSourceFromMemorySection(
    section : IntPtr, 
    pixelWidth : int, 
    pixelHeight : int, 
    format : PixelFormat, 
    stride : int, 
    offset : int
) : BitmapSource

You cannot use methods in XAML.