What is the purpose of the .NET CLI, and how is it used?

 

What is the .NET CLI?

The .NET CLI (Command-Line Interface) is a cross-platform toolchain for developing, building, running, and publishing .NET applications. It provides a set of commands that enable developers to manage .NET projects and perform various tasks directly from the command line. The .NET CLI is part of the .NET SDK (Software Development Kit) and is particularly useful for developers who prefer working in environments without a graphical user interface (GUI) or for automation scenarios like CI/CD pipelines.

Purpose of the .NET CLI

1. Project Creation: Easily create new .NET projects using templates.
2. Build Management: Compile and build applications and libraries from the command line.
3. Running Applications: Execute .NET applications directly without needing to set up a complete IDE.
4. Package Management: Manage NuGet packages and dependencies for projects.
5. Publishing: Package applications for deployment to different environments.
6. Configuration Management: Modify and view project configurations and settings.
7. Cross-Platform Development: Allow development on different operating systems, including Windows, macOS, and Linux.

Commonly Used .NET CLI Commands

Here are some commonly used .NET CLI commands:

1. Creating a New Project:

   
   dotnet new console -n MyConsoleApp
   

   This command creates a new console application project named MyConsoleApp.

2. Building a Project:

   
   dotnet build
   

   This command compiles the project in the current directory, generating the necessary output files.

3. Running a Project:

   
   dotnet run
   

   This command runs the application in the current directory. It's typically used after building the project.

4. Adding a NuGet Package:

   
   dotnet add package Newtonsoft.Json
   

   This command adds the Newtonsoft.Json package to the project, managing dependencies.

5. Restoring Packages:

   
   dotnet restore
   

   This command restores the dependencies and tools specified in the project file.

6. Publishing an Application:

   
   dotnet publish -c Release
   

   This command builds the application in Release mode and prepares it for deployment, including all necessary files.

7. Viewing Project Information:

   
   dotnet --info
   

   This command displays information about the .NET SDK version, runtime environment, and installed components.

8. Running Tests:

   
   dotnet test
   

   This command runs tests in the specified project or solution, providing feedback on test results.

Example Workflow

Here’s a simple example workflow using the .NET CLI to create, build, run, and publish a console application:

1. Create a New Console Application:

   
   dotnet new console -n HelloWorld
   cd HelloWorld
   

2. Add a NuGet Package (if needed):

   
   dotnet add package Newtonsoft.Json
   

3. Build the Application:

   
   dotnet build
   

4. Run the Application:

   
   dotnet run
   

5. Publish the Application:

   
   dotnet publish -c Release -o ./publish
   

Conclusion

The .NET CLI is a powerful tool for developers to manage .NET applications efficiently. It supports a wide range of commands and can be integrated into scripts and automation tools, making it an essential part of the .NET development workflow.