The new microservice has its own separate .NET solution that includes three .NET projects:
* `CloudCrm.Catalog` is the main project that you will implement your service. It typically contains your [entities](../../framework/architecture/domain-driven-design/entities.md), [repositories](../../framework/architecture/domain-driven-design/repositories.md), [application services](../../framework/architecture/domain-driven-design/application-services.md), API controllers, etc.
* `CloudCrm.Catalog.Contracts` project can be shared with the other services and applications. It typically contains interfaces of your [application services](../../framework/architecture/domain-driven-design/application-services.md), [data transfer objects](../../framework/architecture/domain-driven-design/data-transfer-objects.md), and some other types you may want to share with the clients of this microservice.
* `CloudCrm.Catalog.Tests` is for building your unit and integration tests for this microservice.