Laying it out: Onion Architecture

It's a fact, there is no Single Silver Bullet for every solution, but we can come damn close. Having the right architecture sets a solid foundation for any solution. When I say "architecture", I mean structuring the solution in a specific strategic way; with the aim to have the components (or layers) loosely coupled and tightly cohesive to the maximum extent possible keeping in mind the feasibility of the trade-off.