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docs/articles/tools/mapster-tool/Attribute-based-Extension-generation.md

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Generate extension methods via attributes

Generate using [GenerateMapper] attribute

For any POCOs annotate with [AdaptFrom], [AdaptTo], or [AdaptTwoWays], you can add [GenerateMapper] in order to generate extension methods.

Example:

csharp
[AdaptTo("[name]Dto"), GenerateMapper]
public class Student {
    ...
}

Then Mapster will generate:

csharp
public class StudentDto {
    ...
}
public static class StudentMapper {
    public static StudentDto AdaptToDto(this Student poco) { ... }
    public static StudentDto AdaptTo(this Student poco, StudentDto dto) { ... }
    public static Expression<Func<Student, StudentDto>> ProjectToDto => ...
}