AutoMapper creates an execution plan for your mapping. That execution plan can be viewed as an expression tree during debugging. You can get a better view of the resulting code by installing the ReadableExpressions VS extension. If you need to see the code outside VS, you can use the ReadableExpressions package directly.
var configuration = new MapperConfiguration(cfg => cfg.CreateMap<Foo, Bar>());
var executionPlan = configuration.BuildExecutionPlan(typeof(Foo), typeof(Bar));Be sure to remove all such code before release.
For ProjectTo, you need to inspect IQueryable.Expression.
var expression = context.Entities.ProjectTo<Dto>().Expression;