At design time pack uri is valid, but not at runtime?

Question

I\'m setting a Button\'s content to an Image. It looks something like this:

Answer 1

One other solution to getting this right:

Once your image Build Action is set to 'Resource' and you have rebuilt, navigate to the properties of your object. The properties window will provide a ... file resource browser, whereupon selecting your image the Source="..." attribute of your will be correctly filled in.