[ERROR (128, 74): 未将对象引用设置到对象的实例。]
    [ERROR (130, 20): Collection used in foreach has to be enumerable]
[ERROR (142, 74): 未将对象引用设置到对象的实例。]
    [ERROR (144, 21): Collection used in foreach has to be enumerable]
[ERROR (156, 76): 未将对象引用设置到对象的实例。]
    [ERROR (158, 22): Collection used in foreach has to be enumerable]
[ERROR (170, 76): 未将对象引用设置到对象的实例。]
    [ERROR (172, 22): Collection used in foreach has to be enumerable]