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

I had a similar problem with the same error message but try as I might, locking the bitmap didn't fix anything for me. Then I realized I was drawing a shape using a static brush. Sure enough, it was the brush that was causing the thread contention.

var location = new Rectangle(100, 100, 500, 500);
var brush = MyClass.RED_BRUSH;
lock(brush)
    e.Graphics.FillRectangle(brush, location);

This worked for my case and lesson learned: Check all the reference types being used at the point where thread contention is occurring.