NETは、汎用オブジェクトをインスタンス化し、値を割り当てます.

        /// 

        ///  
        /// 
        /// 
        /// 
        private static void Builder(T Entity) where T : class, new()
        {
            T newEntity = new T();
            var newEntityType = newEntity.GetType();
            newEntityType.GetProperty(" ").SetValue(newEntity, " ");
        }

2.调用

Builder(new UserDto());