dennisdoomen/fluentassertions — pull request #61 by voicu-matei (2014-01-08 13:42:32+00:00)
Title: Added capability to assert that a generic dictionary with string key and custom equality comparer contains key.

IDictionary dictionary = new
ConcurrentDictionary(StringComparer.OrdinalIgnoreCase);
dictionary.Add("name", "foo");

//The following 2 lines assert the same and should both pass
dictionary.ContainsKey("NaMe").Should().BeTrue(); //passes
dictionary.Should().ContainKey("NaMe"); //failed before

The fix assures that the second line passes also.