I have PostSharp 4.2 enabled on my project.
Also, I have a test project with some integration tests that need to use some classes from PostSharp. So I have PostSharp on my test project.
Issue:
var text = "usuário";
Assert.AreNotEqual(text.Length, text.Normalize(NormalizationForm.FormD).Length);
This test works only if PostSharp build is disabled on my test project.
The issue was fixed in PostSharp 4.2.24.