accessing a resource dictionary in code wpf

Question

The same line of code in the same assembly works for one test fixture but not another. Here is the line of code:

var dic = new ResourceDictionary { Source = new          


        

Answer 1

@Prince Ashitaka answer tells you how to correct your URI

However the preferred way of accessing a ResourceDictionary is that in XAML you add it on as a merged dictionary

then you can access it via code using the TryFindResource(string Key) from any code behind file