InvalidOperationException - object is currently in use elsewhere - red cross

Question

I have a C# desktop application in which one thread that I create continously gets an image from a source(it\'s a digital camera actually) and puts it on a panel(panel.Image

Answer 1

This is because Gdi+ Image class is not thread safe. Hovewer you can avoid InvalidOperationException by using lock every time when you need to Image access, for example for painting or getting image size:

Image DummyImage;

// Paint
lock (DummyImage)
    e.Graphics.DrawImage(DummyImage, 10, 10);

// Access Image properties
Size ImageSize;
lock (DummyImage)
    ImageSize = DummyImage.Size;

BTW, invocation is not needed, if you will use the above pattern.