public static string PrettyPrint<T>(this T obj) {
            var type = typeof(T);
            var props = type.GetProperties(BindingFlags.Instance |
                                           BindingFlags.GetProperty |
                                           BindingFlags.Public);
            var propsInfo = from p in props
                            where p.PropertyType.IsValueType ||
                                  p.PropertyType.IsPrimitive ||
                                  p.PropertyType.IsEnum ||
                                  p.PropertyType == typeof(string)
                            let v = p.GetValue(obj, null)
                            select string.Format("{0}={1}", p.Name, v);
            return string.Format("{0} = {{ {1} }}",
                                  type.Name, string.Join("; ",
                                  propsInfo.ToArray()));
        }