API example with part of CQRS model. Application is not using any DB, data are mocked id Domain layer.
Changes in PUT endpoint are not stored. Data are reloaded for every call.
API has 5 hardcoded rows of Product object class.

[GET] /v1/Product/GetAll
[GET] /v1/Product/Get/{id}
[PUT] ​/v1​/Product​/UpdateDescription

Recomended: Visual Studio 2019 (or Community) or dotnet in command line

Edit can be done in every text editor (Visual studio recommended). For build is Visual Studio or MSBuild needed.

With Visual Studio:
Open solution Product.Service.sln (placed in folder \Product.Service\). Service can be run in debug mode directly from visual studio without any changes.
Service will run at http://localhost:29144/ and Visual Studio will automatically start window at Swagger documentation (http://localhost:29144/swagger/index.html)

With command line:
Navigate into folder with Product.Service.Main.csproj (placed in folder \Product.Service\Product.Service.Main\).
Run command dotnet run. API is placed in address http://localhost:5000 (for swagger documentation add /swagger into address)

With Visual Studio:
Open solution Product.Service.sln (placed in folder \Product.Service\). Open folder Tests in Solution Explorer. Right click on project Product.Service.UnitTests and click Run Tests

With command line:
Navigate into folder with Product.Service.UnitTests.csproj (placed in folder \Product.Service\Product.Service.UnitTests\).
Run command dotnet test. Results will be printed into console.