public void CacheKey_GetHashCode_EqualKeys()
        {
            var key1 = new FastMemberInvokerCache.CacheKey (typeof (string), "Foo", new Type[0], new[] { typeof (int), typeof (string) });
              var key2 = new FastMemberInvokerCache.CacheKey (typeof (string), "Foo", new Type[0], new[] { typeof (int), typeof (string) });

              Assert.That (key1.GetHashCode(), Is.EqualTo (key2.GetHashCode()));
        }