Implementing CQRS

Here are the steps on how to use the MediatR package in the ASP.NET Core application. The task of the MediatR package is to help you implement both the CQRS and Mediator patterns with ease.

Let's clean up our solution first by deleting all the Class1.cs files you can find in the application. The Class1.cs files were generated when we created the projects.

Adding the MediatR package

We are now going to install the MediatR package:

1. Navigate to your Travel.Application project using the dotnet CLI. Then we need to install some NuGet packages by running the following commands:

   dotnet add package MediatR

   The preceding command installs the mediator implementation in .NET into the Travel.Application project.

   The following command installs the MediatR extensions for ASP.NET Core:

   dotnet add package MediatR.Extensions.Microsoft.DependencyInjection

   The following command installs the logging abstractions for Microsoft.Extensions.Logging:

   dotnet add package Microsoft...