AutoMapper: What is the difference between MapFrom and ResolveUsing?

Question

Ignoring the ResolveUsing overloads that take an IValueResolver, and looking only at these 2 methods:

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Answer 1

Although in many situations either can be used, based on official documentation there is a difference when it comes to LINQ projections. Detailed explanation can be found here.

Long story short: use MapFrom whenever possible.