Tutorial

This an implementation based on the tutorial linked below but with netcoreapp3.1 instead of netframework4.6.
For educational purposes only.

Steps

Create solution

dotnet new sln --name Demo.DependencyInjection

Reference: dotnet new - .NET Core CLI | Microsoft Docs ◳

Create projects

dotnet new console --name Demo.DependencyInjection.Application
dotnet new classlib --name Demo.DependencyInjection.Implementation1 --framework netcoreapp3.1 

Add projects to solution

dotnet sln Demo.DependencyInjection.sln add Demo.DependencyInjection.Application/Demo.DependencyInjection.Application.csproj Demo.DependencyInjection.Implementation1/Demo.DependencyInjection.Implementation1.csproj

Reference: dotnet sln - .NET Core CLI | Microsoft Docs ◳

Create class file CoinExchanger in classlib Demo.DependencyInjection.Implementation1

Typing...

Add reference to Demo.DependencyInjection.Implementation1 in Demo.DependencyInjection.Application

dotnet add Demo.DependencyInjection.Application/Demo.DependencyInjection.Application.csproj reference Demo.DependencyInjection.Implementation1/Demo.DependencyInjection.Implementation1.csproj

Reference: dotnet add reference - .NET Core CLI | Microsoft Docs ◳

Modify class Program in console Demo.DependencyInjection.Application

Typing...

Run

dotnet run --project Demo.DependencyInjection.Application\Demo.DependencyInjection.Application.csproj 

Reference: dotnet run - .NET Core CLI | Microsoft Docs ◳

Change to two Implementation

Create project

dotnet new classlib --name Demo.DependencyInjection.Abstractions --framework netcoreapp3.1

Add to solution

dotnet sln Demo.DependencyInjection.sln add Demo.DependencyInjection.Abstractions/Demo.DependencyInjection.Abstractions.csproj

Create interface file ICoinExchanger

Typing...

Add reference to Demo.DependencyInjection.Abstractions in Demo.DependencyInjection.Implementation1

dotnet add Demo.DependencyInjection.Implementation1/Demo.DependencyInjection.Implementation1.csproj reference Demo.DependencyInjection.Abstractions/Demo.DependencyInjection.Abstractions.csproj

Modify class file CoinExchanger in classlib Demo.DependencyInjection.Implementation1 and rename to CoinExchanger1

Typing...

Create project

dotnet new classlib --name Demo.DependencyInjection.Implementation2 --framework netcoreapp3.1 

Add to solution

dotnet sln Demo.DependencyInjection.sln add Demo.DependencyInjection.Implementation2/Demo.DependencyInjection.Implementation2.csproj

Add reference to Demo.DependencyInjection.Abstractions in Demo.DependencyInjection.Implementation2

dotnet add Demo.DependencyInjection.Implementation2/Demo.DependencyInjection.Implementation2.csproj reference Demo.DependencyInjection.Abstractions/Demo.DependencyInjection.Abstractions.csproj

Create class file CoinExchanger2 in classlib Demo.DependencyInjection.Implementation2

Typing...

Add reference to Demo.DependencyInjection.Implementation2 in Demo.DependencyInjection.Application

dotnet add Demo.DependencyInjection.Application/Demo.DependencyInjection.Application.csproj reference Demo.DependencyInjection.Implementation2/Demo.DependencyInjection.Implementation2.csproj

Modify class Program for 1 or 2

Typing...

Run

dotnet run --project Demo.DependencyInjection.Application\Demo.DependencyInjection.Application.csproj

Using DependencyInjection

Add Autofac package to Demo.DependencyInjection.Application

dotnet add Demo.DependencyInjection.Application\Demo.DependencyInjection.Application.csproj package Autofac --version 5.2.0

Reference: dotnet add package - .NET Core CLI | Microsoft Docs ◳

Reference: Autofac 5.2.0 | Nuget Gallery ◳

Create class file IoCConfiguration in Demo.DependencyInjection.Application

Typing...

Link: AutoFac Docs ◳

Run

dotnet run --project Demo.DependencyInjection.Application\Demo.DependencyInjection.Application.csproj

Finish

Referenced tutorial: ¿Qué es la inyección de dependencias, para qué sirve y qué significan los tiempos de vida en su implementación? | Baufest© 2020 ◳