How to convert ImageSource to byte [] and return to ImageSource?

I need to have the path to the image file from the user and save the image in my sql server database.

I get the file from the user and convert it to byte [] using the method

public static byte[] ImageToByteArray( BitmapSource bitmapSource )
    {
        byte[] imgAsByteArray = null;

        if( bitmapSource != null )
        {
            imgAsByteArray = ( new WriteableBitmap( ( BitmapSource )bitmapSource ) ).Pixels.SelectMany( p => new byte[] 
            { 

                ( byte )  p        , 
                ( byte )( p >> 8  ), 
                ( byte )( p >> 16 ), 
                ( byte )( p >> 24 ) 

            } ).ToArray(); 
        }

        return imgAsByteArray;
    }

but now I can not convert it to BitmapSource. The code I wrote to convert it throws an exception

The code:

public static BitmapSourcebyteArrayToImage( byte[] imageBytes )
    {
        BitmapImage bitmapImage = null;
        using( MemoryStream ms = new MemoryStream( imageBytes, 0, imageBytes.Length ) )
        {
            bitmapImage = new BitmapImage();
            bitmapImage.SetSource( ms );    
        }

        return (BitmapSource)bitmapImage;
    }

I get an exception in the string bitmapImage.SetSource (ms);
Exception Information - Catastrophic Failure