AutoMapper Mapping to Class With Custom Constructor - gecko-8/devwiki GitHub Wiki
When mapping to a class with a custom constructor with parameters (whether or not you've defined a parameter-less constructor as well), AutoMapper will not map properties correctly unless you specify the constructor behaviour. There are basically two options:
Tell it to use the parameterless constructor (if you have one)
CreateMap<SourceType, DestinationType>()
.ConstructUsing(src => new DestinationType()) // Ignores custom constructor and maps normally
... Any other mapping instructions
Tell it to use the custom constructor
CreateMap<SourceType, DestinationType>()
.ConstructUsing(src =>
new DestinationType(src.Parameter1, src.Parameter2, ...));