Silverlight protects the content. Access to pixels is not allowed

Recently, a function has been developed for the project. About. And then upload the image to the server.

In SL, the URL is displayed, but an error is displayed: Silverlight protects the content. Access to pixels is not allowed

 

The writeablebitmap class is used, but when the pixel information of writeablebitmap is obtained, the following error occurs: writeablebitmap protects the content and cannot access pixels. According to msdn, the map in the map loading control is a cross-origin resource, and the pixels of writeablebitmap with cross-origin content cannot be obtained. This restriction is also extended to other controls that reference this writebitmap. However, you can access its pixelwidth and pixelheight.
It is said that it is to protect copyright.

There should be no way to do this in Silverlight.
It is restricted by Microsoft's cross-domain security mechanism. To use the writeablebitmap, you can only find a way to get the resources locally.