public static T DeepCopyByReflect<T>(T obj)    {        //如果是字符串或值类型则间接返回        if (obj is string || obj.GetType().IsValueType) return obj;        object retval = Activator.CreateInstance(obj.GetType());        FieldInfo[] fields = obj.GetType().GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);        foreach (FieldInfo field in fields)        {            try { field.SetValue(retval, DeepCopyByReflect(field.GetValue(obj))); }            catch { }        }        return (T)retval;    }