dto-mapping

I recently started a new webforms project and decided to separate the business classes from any DBML references. My business layer classes instead access discrete Data layer methods and are returned collections of DTO's. So the data layer might project DTO's like the following: (from c in dataContext.Customers where c.Active == true select new DTO.Customer { CustomerID = c.CustomerID, Name = c.CustomerName, ... }).ToList() Although building the DTO objects adds work, this feels like a better approach to a tight binding between Business & Data layers and means I can test the Business layer

Trying to automap some objects. Source objects has properties with _ before name, destination objects - have not. Is it possible to implement ONE map creation, that automapper would map all _properties to properties for all source types. class MyMapper<TFrom, TTo>{ TTo PerformMap(TFrom fromObject){ Mapper.CreateMap<From, To>(); // ??? TTo result = Mapper.Map<From, To>(fromObject); //result.Id.ShouldBe(value from TFrom._Id); return result; } } class From { public int _Id { get; set; } public string _Name { get; set; } } class To { public int Id { get; set; } public string Name { get; set; } }