Validation application block. Developers can use this application block to create validation rules for business objects that can be used across different layers of their applications.
开发者可以使用此模块为业务对象去出创建建验证规则，它可以跨越不同的应用程序层。
Validation application block. Developers can use this application block to create validation rules for business objects that can be used across different layers of their applications.
开发者可以使用此模块为业务对象去出创建建验证规则，它可以跨越不同的应用程序层。
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