I don\'t know exactly if it is a bug but i am getting all the time runtime IOException error saying Cannot locate resource.
I am loading some images in my app (c#, WPF)
I've had a similar issue: IOException, cannot locate a png resource which indeed existed in the assembly.
I found the solution by explicitly specifying the assembly name, even though the caller was in the same assembly as the resource.
Here's how it looks with a Pack URI syntax:
pack://application:,,,/MyAssemblyName;component/MyResourcesFolder/MyImage.png
(For more about Pack URIs see http://msdn.microsoft.com/en-us/library/aa970069.aspx)
Edit: One more thing I had to do after specifying the assembly name was to Clean the project. The problem returns after build but was resolved after cleaning the intermediate products. This is definitely a bug in Visual Studio.