Csharp 映射器如何映射到多个实体

使用Mapster Mapper时，我觉得重复不应该使用的代码.

public class Workshop
{
    public Guid Id {get;set;}
    public string? Title {get;set;}
    public string? Text {get;set;}

    public IList<WorkshopParticipant> WorkshopParticipants {get;set;}
}

public class WorkshopDto
{
    public Guid Id {get;set;}
    public string? Title {get;set;}
    public int Participants {get;set;}
}

public class WorkshopWithTextDto : WorkshopDto
{
    public string? Text {get;set;}
}

TypeAdapterConfig<Workshop, WorkshopDto>.NewConfig()
  .Map(dest => dest.Participants, src => src.Participants!.Count(x => x.Status == "attended")))

// Why should I have this, when WorkshopWithTextDto is inheriting from WorkshopDto that already have the mapping?
TypeAdapterConfig<Workshop, WorkshopWithTextDto>.NewConfig()
  .Map(dest => dest.Participants, src => src.Participants!.Count(x => x.Status == "attended")))

有没有什么方法可以重复使用映射，这样我就不必重复计算参与者了？

从其他问题中，我看到可以对源对象使用元组，但在目标对象上似乎不可能--或者我错了？

统计参与人数的例子只是为了描述这个问题.通常情况下，计算要复杂得多，如果只需要维护一个位置就好了.

一种解决方案是使用一个函数为目的地赋值，如下所示:

public static int CountParticipants(IList<WorkshopParticipant> workshopParticipants)
{
    return workshopParticipants!.Count(x => x.Status == "attended");
}

TypeAdapterConfig<Workshop, WorkshopDto>.NewConfig()
  .Map(dest => dest.Participants, src => CountParticipants(src.WorkshopParticipants!))

TypeAdapterConfig<Workshop, WorkshopWithTextDto>.NewConfig()
  .Map(dest => dest.Participants, src => CountParticipants(src.WorkshopParticipants!))

但我仍然需要执行两个TypeAdapterConfigs.

这是否可以做到"更智能"--更易于维护？