How to Download and Use .NET Standard 2.0
If you are a developer who wants to create libraries or applications that can run on multiple .NET platforms, such as Windows, Linux, macOS, iOS, Android, and more, you might want to use .NET Standard 2.0. In this article, you will learn what is .NET Standard, why you should use it, how to download it, and how to use it in your projects.
What is .NET Standard?
A formal specification of common APIs across .NET implementations
.NET Standard is a formal specification of the APIs that are common across all the .NET implementations. It defines a set of contracts that every .NET platform must implement to be compatible with .NET Standard. By targeting .NET Standard, you can ensure that your code will work on any .NET platform that supports it, without having to worry about platform-specific differences or dependencies.
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A way to share code between .NET Framework and other .NET platforms
.NET Standard is also a way to share code between .NET Framework and other .NET platforms, such as .NET Core, Xamarin, Mono, Unity, and more. If you want to create a library that can be used by both .NET Framework and other .NET platforms, you should target .NET Standard instead of a specific platform. This way, you can avoid having to create multiple versions of your library for different platforms.
Why Use .NET Standard 2.0?
The latest and most widely supported version of .NET Standard
.NET Standard 2.0 is the latest and most widely supported version of .NET Standard. It was released in August 2017 and it includes more than 32,000 APIs, covering most of the common scenarios for cross-platform development. It also has a high compatibility rate with existing libraries that target .NET Framework.
Compatible with .NET Framework 4.6.1 and higher, .NET Core 2.0 and higher, and other .NET platforms
.NET Standard 2.0 is compatible with many existing and future versions of .NET platforms. Specifically, it is supported by:
.NET Framework 4.6.1 and higher
.NET Core 2.0 and higher
Mono 5.4 and higher
Xamarin.iOS 10.14 and higher
Xamarin.Mac 3.8 and higher
Xamarin.Android 8.0 and higher
Universal Windows Platform (UWP) 10.0.16299 and higher
Unity 2018.1 and higher
This means that you can use your library or application that targets .NET Standard 2.0 on any of these platforms without having to make any changes.
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Enables cross-platform development and deployment of libraries and applications
.NET Standard 2.0 enables you to create libraries and applications that can run on multiple platforms and devices, such as Windows, Linux, macOS, iOS, Android, and more. You can also deploy your library or application to various cloud services, such as Azure, AWS, Google Cloud, and more. This gives you more flexibility and reach for your projects.
How to Download .NET Standard 2.0?
Download the .NET SDK for your operating system
To download .NET Standard 2.0, you need to download the .NET SDK for your operating system. The .NET SDK is a set of tools and libraries that you can use to create and run .NET applications and libraries. You can download the .NET SDK from the official website. You can choose the version that matches your operating system and architecture.
Install the .NET SDK and verify the installation
After downloading the .NET SDK, you need to install it on your machine. The installation process may vary depending on your operating system and preferences. You can follow the instructions on the official website or use the installer that comes with the download. After installing the .NET SDK, you can verify that it is working by opening a command prompt or terminal and typing:
dotnet --version
This should display the version of the .NET SDK that you have installed. If you see an error message or nothing happens, you may need to check your installation or environment variables.
Create a new project or library that targets .NET Standard 2.0
Once you have installed the .NET SDK, you can create a new project or library that targets .NET Standard 2.0. You can use the dotnet command-line tool to create a new project or library from a template. For example, to create a new console application that targets .NET Standard 2.0, you can type:
dotnet new console -o MyConsoleApp
This will create a new folder called MyConsoleApp with a file called Program.cs that contains the code for a simple console application. You can also specify other options, such as the language (C#, F#, or VB), the output type (exe or dll), and the framework (netstandard2.0). You can see all the available options by typing:
dotnet new --help
You can also use Visual Studio or other IDEs to create a new project or library that targets .NET Standard 2.0.
How to Use .NET Standard 2.0?
Write code using the APIs defined in the .NET Standard specification
To use .NET Standard 2.0, you can write code using the APIs defined in the .NET Standard specification. These APIs are available in all the .NET platforms that support .NET Standard 2.0, so you don't have to worry about platform-specific differences or dependencies. You can use any of the supported languages, such as C#, F#, or VB, to write your code.
Reference other libraries that target .NET Standard or compatible platforms
You can also reference other libraries that target .NET Standard or compatible platforms in your project or library. For example, if you want to use Newtonsoft.Json, a popular library for working with JSON data, you can add it as a dependency to your project or library by typing:
dotnet add package Newtonsoft.Json
This will download and install the latest version of Newtonsoft.Json that is compatible with your project or library. You can then use it in your code by adding a using statement:
using Newtonsoft.Json;
You can also reference other libraries that target specific platforms, such as .NET Framework or .NET Core, as long as they are compatible with .NET Standard 2.0.
Build, test, and publish your project or library
After writing your code and referencing other libraries, you can build, test, and publish your project or library using the dotnet command-line tool or Visual Studio or other IDEs. For example, to build your project or library, you can type:
dotnet build
This will compile your code and produce an output file (exe or dll) in the bin folder. To test your project or library, you can use a testing framework, such as xUnit, NUnit, MSTest, etc., and run it using:
dotnet test
This will run your tests and display the results in the console. To publish your project or library, you can type:
dotnet publish
This will create a folder with all the files needed to run your project or library on the target platform. You can then distribute or deploy your project or library to your users or customers.
Conclusion
In this article, you learned how to download and use .NET Standard 2.0, the latest and most widely supported version of .NET Standard. You learned what is .NET Standard, why you should use it, how to download it, and how to use it in your projects. You also learned how to write code using the APIs defined in the .NET Standard specification, reference other libraries that target .NET Standard or compatible platforms, and build, test, and publish your project or library. By using .NET Standard 2.0, you can create libraries and applications that can run on multiple .NET platforms and devices, such as Windows, Linux, macOS, iOS, Android, and more.
FAQs
What is the difference between .NET Standard and .NET Core?
.NET Standard is a specification of common APIs across .NET implementations, while .NET Core is an implementation of .NET that runs on Windows, Linux, and macOS. You can target .NET Standard to create libraries that can be used by any .NET platform that supports it, including .NET Core. You can target .NET Core to create applications that can run on Windows, Linux, and macOS.
How do I know which version of .NET Standard to use?
You should use the highest version of .NET Standard that is supported by all the platforms that you want to target. For example, if you want to target .NET Framework 4.6.1 and higher, .NET Core 2.0 and higher, and Xamarin.iOS 10.14 and higher, you should use .NET Standard 2.0. You can check the compatibility matrix on the official website to see which platforms support which versions of .NET Standard.
How do I migrate my existing projects or libraries to .NET Standard?
If you have existing projects or libraries that target a specific platform, such as .NET Framework or .NET Core, you can migrate them to .NET Standard by changing the target framework in the project file or using Visual Studio or other IDEs. You may also need to update some of the dependencies or code to make sure they are compatible with .NET Standard. You can follow the migration guide on the official website for more details.
Where can I find more information about .NET Standard?
You can find more information about .NET Standard on the official website, where you can read the documentation, download the SDK, view the source code, report issues, and contribute to the project. You can also find tutorials, blogs, videos, podcasts, books, and courses on various online platforms that cover different aspects of .NET Standard.
How can I get help or support for using .NET Standard?
If you need help or support for using .NET Standard, you can ask questions on Stack Overflow using the tag [.net-standard], where you can get answers from other developers and experts. You can also join the [.NET community], where you can connect with other developers and enthusiasts who use .NET Standard and other related technologies. You can also contact Microsoft support if you have a paid subscription or license. 44f88ac181
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