can't access to pictureMarkerSymbol

[BettyKeren]

Hello,
I'm trying to get the ImageSource from the feature-symbol on the map in order to display it on other control.

I registered to the event: featureLayer_MouseLeftButtonUp
and tried to convert e.Graphic.Symbol to PictureMarkerSymbol,

the problem is that pictureMarkerSymbol was defined in the namespace:
ESRI.ArcGIS.Client.FeatureService.Symbols.PictureMarkerSymbol

and when I try to use it I get a compile error -"cannot access internal class PictureMarkerSymbol"

Is it possible to get the PictureMarkerSymbol object in other way?
or maybe i can get the feature symbol (the image) in different way?

Thanks!
Betty

[JenniferNery]

The PictureMarkerSymbol created by the service is different from the PictureMarkerSymbol exposed in our API.

You can however, parse the Json string to get to the imageData and create a BitmapImage from this Source.

 byte[] contentInBytes = Convert.FromBase64String(imageData);
 BitmapImage bmi = new BitmapImage();
 bmi.SetSource(new MemoryStream(contentInBytes));

For example this service:http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/SanFrancisco/311Incidents/MapServer/0

If you append "?f=pjson" or "?f=json", you will see that each esriPMS has an imageData.

[MichaelFaulcon1]

The bitmaps created using this method have a black background that ArcMap will not allow me to make transparent.
Is there a way to utilize this image and still honor background transparency?