public void GetHashCodeTest () { DisplayNameAttribute dn = new DisplayNameAttribute (); Assert.AreEqual (string.Empty.GetHashCode (), dn.GetHashCode (), "#A1"); dn = new DisplayNameAttribute ("A"); Assert.AreEqual ("A".GetHashCode (), dn.GetHashCode (), "#A2"); // https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=288534 dn = new DisplayNameAttribute (null); try { dn.GetHashCode (); Assert.Fail ("#B1"); } catch (NullReferenceException) { } }