10.0 Upgrade Guide

Release notes.

All collections are mapped by default, even if they have no setter

You’ll have to explicitly ignore those you don’t want mapped. See also this.

Matching constructor parameters will be mapped from the source, even if they are optional

You can always rename things or use an explicit MapFrom.

Context.Mapper.Map overloads that receive a context were removed

Not needed, because the context is passed by default, so you can change the context instance you already have.

UseDestinationValue is now inherited by default

You can override that with DoNotUseDestinationValue.

AllowNull allows you to override per member AllowNullDestinationValues and AllowNullCollections

This used to be ignored for Map. Now it’s consistent with ProjectTo.

The ResolutionContext no longer has a public constructor

You can test the entire Map operation.

Mapping from dynamic in .NET 4.6.1

Due to a refactoring of IMapper, you might need to add a cast to object when mapping from dynamic.

Source validation

Only simple source members expressions are considered, MapFrom(d => d.Member, s => s.SourceMember).

MaxDepth

When reaching MaxDepth, destination collections are null/empty, they used to contain null values.

String based MapFrom-s are reversed now, also applies to attribute mapping

You can always not use it and explicitly create the reverse map. Or ignore the reversed member.

ReverseMap will also reverse the naming conventions

You can always not use it and explicitly create the reverse map.