Add your code to the dataset's partial class file.

向数据集的分部类文件中添加代码。

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A partial method is usually defined in a partial class file and is optionally implemented in the regular class file.

分部方法通常被定义在一个分部类中，在常规的类文件中也可实现。

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In addition, when you use partial classes, a mapping model is used to direct each definition of the partial class into a file based on your requirements.

另外，当您使用局部类型时，应用映射模式基于您的需要，可以指导局部类型的每个定义成为一篇文档。

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