public void FindTypesByAttributeInstance()
 {
     var assemblyName = "test1.dll";
     GenerateAssembly(@"namespace ClassLibrary
     {
     [System.Obsolete]
     public class ClassWithAttribute
     {
     public int GetNumber()
     {
     return 42;
     }
     }
     }", assemblyName);
     Assert.IsTrue(File.Exists(assemblyName));
     var types = new ObsoleteAttribute().FindAttributedTypes(".", assemblyName);
     Assert.AreEqual(1, types.Count());
 }