Install Unity Container in C# .NET Core

Install Unity Container in C# .NET Core

Introduction: Unity Container is a dependency injection (DI) container provided by Microsoft. It helps manage the creation and resolution of object dependencies in an application. This documentation provides step-by-step instructions on how to install Unity Container in a C# .NET Core project.

Prerequisites:

1. Visual Studio or Visual Studio Code installed.
2. .NET Core SDK installed.
3. Basic knowledge of C# and dependency injection.

Installation Steps:

Step 1: Create a New .NET Core Project

1. Open Visual Studio or Visual Studio Code.
2. Click on "Create a new project."
3. Select ".NET Core" under "Create a new project" menu.
4. Choose the desired project template and click "Next."
5. Provide a project name, solution name, and location. Click "Create" to create the project.

Step 2: Install Unity Container Package

1. Open the project in Visual Studio or Visual Studio Code.
2. Open the terminal or package manager console.
3. Run the following command to install Unity Container package:

shell
dotnet add package Unity

4. Wait for the package to be installed. Unity Container is now added to the project.

Step 3: Configure Unity Container

1. Open the Startup.cs file or create a new file named UnityConfig.cs to configure Unity Container.
2. Add the following using statement at the top of the file:

csharp
using Unity;

3. Inside the ConfigureServices method, add the following code to configure Unity Container:

csharp
public void ConfigureServices(IServiceCollection services)
{
    // ...

    var container = new UnityContainer();
    container.RegisterType<IMyService, MyService>();
    
    // ...

    services.AddSingleton<IUnityContainer>(container);
}

4. Replace IMyService and MyService with your own interface and implementation classes.

Step 4: Use Unity Container

1. Open a controller or a class where you want to use Unity Container for dependency injection.
2. Add the following using statement at the top of the file:

csharp
using Unity;

3. In the class constructor, add a parameter of type IUnityContainer:

csharp
private readonly IUnityContainer _container;

public MyClass(IUnityContainer container)
{
    _container = container;
}

4. Use _container.Resolve<T>() to resolve dependencies:

csharp
public void SomeMethod()
{
    var myService = _container.Resolve<IMyService>();
    // Use myService...
}

Conclusion: By following the steps outlined in this documentation, you have successfully installed Unity Container in a C# .NET Core project. Unity Container allows you to leverage dependency injection to manage object dependencies efficiently.