At the top of the partial class definition for the form, add the following code.
在表单的partial类定义顶部，添加以下代码。
Note that under the default behavior of the markup compile build actions, you can leave the derivation blank in the partial class definition on the code-behind side.
请注意，在标记编译生成操作的默认行为下，您可以在代码隐藏端的分部类定义中将派生保留为空。
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。
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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