Can't add Graphic to a GraphicsLayer

ShaningYu — Fri, 24 Mar 2017 14:09:10 GMT

This is .Net (Silverlight) program. I want to add a Graphic item to a GraphicsLayer. The related code is listed below

            GraphicsLayer newGLyr = new GraphicsLayer();
            for (int i = 0; i < gLayer.Graphics.Count; i++)     {
                Graphic g = gLayer.Graphics;
                if (!isDuplicate(newGLyr, g))
                    newGLyr.Graphics.Add(g);
            }

However, I got the runtime error:

Specified argument was out of the range of valid values. Parameter name: Graphic is already associated with another layer.

How can this be fixed? Thanks.

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Can't add Graphic to a GraphicsLayer