At Microsoft Build Live today, we are sharing a first look at our plans for .NET Core 3. The highlight of .NET Core 3 is support for Windows desktop applications, specifically Windows Forms, Windows Presentation Framework (WPF), and UWP XAML. You will be able to run new and existing Windows desktop applications on .NET Core and enjoy all the benefits that .NET Core has to offer.
We are planning on releasing a first preview of .NET Core 3 later this year and the final version in 2019. We will be looking for developers to partner with us, to give us feedback, and to release versions of your applications in the same timeframe as our releases. We think that .NET Core 3.0 will be one of the most exciting .NET releases we’ve ever released.
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ASP.NET Core will continue to move forward in parallel and will have a release with .NET Core 3.0. Our commitment to web and cloud applications remains unchanged. At the same time, it’s time to add Windows desktop applications as another supported workload for .NET Core. We have heard many requests for desktop applications with .NET Core and are now sharing our plan to deliver on that. Let’s take a look at that.
Benefits of .NET Core for Desktop
There are many benefits with .NET Core that are great for desktop apps. Recording studio software for mac. There are a few that are worth calling out explicitly:
We’re also announcing a set of improvements that we’ll be adding to both .NET Core 3.0 and .NET Framework 4.8:
.NET Framework 4.8
We’re also announcing our plans for .NET Framework 4.8. after shipping .NET Framework 4.7.2 only a week ago. We expect the next version to be 4.8 and for it to ship in about 12 months. Like the past few releases, the new release will include a set of targeted improvements, including the features you see listed above.
Visualizing .NET Core 3
Let’s take a look at .NET Core 3 in pictorial form.
Support for Windows desktop will be added as a set of “Windows Desktop Packs”, which will only work on Windows. .NET Core isn’t changing architecturally with this new version. We’ll continue to offer a great cross-platform product, focused on the cloud. We have lots of improvements planned for those scenarios that we’ll share later.
From a 1000-meter view, you can think of WPF as a rich layer over DirectX and Windows Forms as thinner layer over GDI Plus. WPF and Windows Forms do a great job of exposing and exercising much of the desktop application functionality in Windows. It’s the C# code in Windows Forms and WPF that we’ll include as a set of libraries with .NET Core 3. Windows functionality, like GDI Plus and DirectX, will remain in Windows.
We’ll also be releasing a new version of .NET Standard at the same time. Naturally, all new .NET Standard APIs will be part of .NET Core 3.0. We have not yet added Span<T>, for example, to the standard. We’ll be doing that in the next version.
C#, F# and VB already work with .NET Core 2.0. You will be able to build desktop applications with any of those three languages with .NET Core 3.
Side-by-side and App-local Deployment
The .NET Core deployment model is one the biggest benefits that Windows desktop developers will experience with .NET Core 3. In short, you can install .NET Core in pretty much any way you want. It comes with a lot of deployment flexibility.
The ability to globally install .NET Core provides much of the same central installation and servicing benefits of .NET Framework, while not requiring in-place updates.
When a new .NET Core version is released, you can update one app on a machine at a time without any concern for affecting other applications. New .NET Core versions are installed in new directories and are not used by existing applications.
For cases where the maximum isolation is required, you can deploy .NET Core with your application. We’re working on new build tools that will bundle your app and .NET Core together as in a single executable, as a new option.
We’ve had requests for deployment options like this for many years, but were never able to deliver those with the .NET Framework. The much more modular architecture used by .NET Core makes these flexible deployment options possible.
Using .NET Core 3 for an Existing Desktop Application
For new desktop applications, we’ll guide everyone to start with .NET Core 3. The more interesting question is what the experience will be like to move existing applications, particularly big ones, to .NET Core 3. We want the experience to be straightforward enough that moving to .NET Core 3 is an easy choice for you, for any application that is in active development. Applications that are not getting much investment and don’t require much change should stay on .NET Framework 4.8.
Quick explanation of our plan:
We intend to provide compatible APIs for desktop applications. We plan to make WPF and Windows Forms side-by-side capable, but otherwise as-is, and make them work on .NET Core. In fact, we have already done this with a number of our own apps and others we have access to.
We have a version of Paint.NET running in our lab. In fact, we didn’t have access to Paint.NET source code. We got the existing Paint.NET binaries working on .NET Core. We didn’t have a special build of WPF available, so we just used the WPF binaries in the .NET Framework directory on our lab machine. As an aside, this exercise uncovered an otherwise unknown bug in threading in .NET Core, which was fixed for .NET Core 2.1. Nice work, Paint.NET!
We haven’t done any optimization yet, but we found that Paint.NET has faster startup on .NET Core. This was a nice surprise.
Similarly, EF6 will be updated to work on .NET Core 3.0, to provide a simple path forward for existing applications using EF6. But we don’t plan to add any major new features to EF6. EF Core will be extended with new features and will remain the recommended data stack for all types of new applications. We will advise that you port to EF Core if you want to take advantage of the new features and improved performance.
There are many design decisions ahead, but the early signs are very good. We know that compatibility will be very important to everyone moving existing desktop applications to .NET Core 3. We will continue to test applications and add more functionality to .NET Core to support them. We will post about any APIs that are hard to support, so that we can get your feedback.
Updating Project Files
With .NET Core projects, we adopted SDK-style projects. One of the key aspects of SDK-style projects is
PackageReference , which is a newer way of referencing NuGet packages. PackageReference replaces packages.config. PackageReference also make it possible to reference a whole component area at once, not just a single assembly at a time.
The biggest experience improvements with SDK-style projects are:
The first part of adopting .NET Core 3 for desktop projects will be migrating to SDK-style projects. There will be a migration experience in Visual Studio and available at the command line.
An example of an SDK-style project, for ASP.NET Core 2.1, follows. .NET Core 3 project files will look similar.
Controls, NuGet Packages, and Existing Assembly References
Desktop applications often have many dependencies, maybe from a control vendor, from NuGet or binaries that don’t have source any more. It’s not like all of that can be updated to .NET Core 3 quickly or maybe not even at all.
As stated above, we intend to support dependencies as-is. If you are at the Build conference, you will see Scott Hunter demo a .NET Core 3 desktop application that uses an existing 3rd-party control. We will continue testing scenarios like that to validate .NET Core 3 compatibility.
Next Steps
We will start doing the following, largely in parallel:
We hope that you will work with us along the way to help us make .NET Core 3 a great release.
Closing
We have been asking for feedback on surveys recently. Thanks so much for filling those out. The response has been incredible, resulting in thousands of responses within the first day. With this last survey, we asked a subset of respondents over Skype for feedback on our plans for .NET Core 3 with (unknown to them) our Build conference slides. The response has been very positive. Based on everything we have read and heard, we believe that the .NET Core 3 feature set its characteristics are on the right track.
Todays news demonstrates a large investment and commitment in Windows desktop applications. You can expect two releases from us in 2019, .NET Core 3 and .NET Framework 4.8. A number of the features are shared between the two releases and some others are only available in .NET Core 3. We think the commonality and the differences provide a great set of choices for moving forward and modernizing your desktop applications.
It is an exciting time to be a .NET developer.
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Python is a popular programming language that is reliable, flexible, easy to learn, free to use on all operating systems, and supported by both a strong developer community and many free libraries. Python supports all manners of development, including web applications, web services, desktop apps, scripting, and scientific computing, and is used by many universities, scientists, casual developers, and professional developers alike. You can learn more about the language on python.org and Python for Beginners.
Visual Studio is a powerful Python IDE on Windows. Visual Studio provides open-source support for the Python language through the Python Development and Data Science workloads (Visual Studio 2017 and later) and the free Python Tools for Visual Studio extension (Visual Studio 2015 and earlier).
Python is not presently supported in Visual Studio for Mac, but is available on Mac and Linux through Visual Studio Code (see questions and answers).
To get started:
Visual Studio supports Python version 2.7, as well as version 3.5 and greater. While it is possible to use Visual Studio to edit code written in other versions of Python, those versions are not officially supported and features such as IntelliSense and debugging might not work.
Support for multiple interpreters
Visual Studio's Python Environments window (shown below in a wide, expanded view) gives you a single place to manage all of your global Python environments, conda environments, and virtual environments. Visual Studio automatically detects installations of Python in standard locations, and allows you to configure custom installations. With each environment, you can easily manage packages, open an interactive window for that environment, and access environment folders. https://accuintensive.weebly.com/serial-cloner-for-mac-catalina.html.
Use the Open interactive window command to run Python interactively within the context of Visual Studio. Use the Open in PowerShell command to open a separate command window in the folder of the selected environment. From that command window you can run any python script.
For more information:
Rich editing, IntelliSense, and code comprehension
Visual Studio provides a first-class Python editor, including syntax coloring, auto-complete across all your code and libraries, code formatting, signature help, refactoring, linting, and type hints. Visual Studio also provides unique features like class view, Go to Definition, Find All References, and code snippets. Direct integration with the Interactive window helps you quickly develop Python code that's already saved in a file.
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Interactive window
For every Python environment known to Visual Studio, you can easily open the same interactive (REPL) environment for a Python interpreter directly within Visual Studio, rather than using a separate command prompt. You can easily switch between environments as well. (To open a separate command prompt, select your desired environment in the Python Environments window, then select the Open in PowerShell command as explained earlier under Support for multiple interpreters.)
Visual Studio also provides tight integration between the Python code editor and the Interactive window. The Ctrl+Enter keyboard shortcut conveniently sends the current line of code (or code block) in the editor to the Interactive window, then moves to the next line (or block). Ctrl+Enter lets you easily step through code without having to run the debugger. You can also send selected code to the Interactive window with the same keystroke, and easily paste code from the Interactive window into the editor. Together, these capabilities allow you to work out details for a segment of code in the Interactive window and easily save the results in a file in the editor.
Visual Studio also supports IPython/Jupyter in the REPL, including inline plots, .NET, and Windows Presentation Foundation (WPF).
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Project system, and project and item templates
Note
Visual Studio 2019 supports opening a folder containing Python code and running that code without creating Visual Studio project and solution files. For more information, see Quickstart: Open and run Python code in a folder. There are, however, benefits to using a project file, as explained in this section.
Visual Studio helps you manage the complexity of a project as it grows over time. A Visual Studio project is much more than a folder structure: it includes an understanding of how different files are used and how they relate to each other. Visual Studio helps you distinguish app code, test code, web pages, JavaScript, build scripts, and so on, which then enable file-appropriate features. A Visual Studio solution, moreover, helps you manage multiple related projects, such as a Python project and a C++ extension project.
Project and item templates automate the process of setting up different types of projects and files, saving you valuable time and relieving you from managing intricate and error-prone details. Visual Studio provides templates for web, Azure, data science, console, and other types of projects, along with templates for files like Python classes, unit tests, Azure web configuration, HTML, and even Django apps.
For more information:
Full-featured debugging
One of Visual Studio's strengths is its powerful debugger. For Python in particular, Visual Studio includes Python/C++ mixed-mode debugging, remote debugging on Linux, debugging within the Interactive window, and debugging Python unit tests.
In Visual Studio 2019, you can run and debug code without having a Visual Studio project file. See Quickstart: Open and run Python code in a folder for an example.
For more information:
Profiling tools with comprehensive reporting
Profiling explores how time is being spent within your application. Visual Studio supports profiling with CPython-based interpreters and includes the ability to compare performance between different profiling runs.
For more information:
Unit testing tools
Discover, run, and manage tests in Visual Studio Test Explorer, and easily debug unit tests.
For more information:
Azure SDK for Python
The Azure libraries for Python simplify consuming Azure services from Windows, Mac OS X, and Linux apps. You can use them to create and manage Azure resources, as well as to connect to Azure services.
For more information, see Azure SDK for Python and Azure libraries for Python.
Questions and answers
Q. Is Python support available with Visual Studio for Mac?
A. Not at this time, but you can up vote the request on Developer Community. The Visual Studio for Mac documentation identifies the current types of development that it does support. In the meantime, Visual Studio Code on Windows, Mac, and Linux works well with Python through available extensions.
Q. What can I use to build UI with Python?
Hp scanjet 3800 software mac. A. The main offering in this area is the Qt Project, with bindings for Python known as PySide (the official binding) (also see PySide downloads) and PyQt. At present, Python support in Visual Studio does not include any specific tools for UI development.
Q. Can a Python project produce a stand-alone executable?
A. Python is generally an interpreted language, with which code is run on demand in a suitable Python-capable environment such as Visual Studio and web servers. Visual Studio itself does not at present provide the means to create a stand-alone executable, which essentially means a program with an embedded Python interpreter. However, the Python community supplied different means to create executables as described on StackOverflow. CPython also supports being embedded within a native application, as described on the blog post, Using CPython's embeddable zip file. https://renewhorse967.weebly.com/download-spotify-songs-converter.html.
Feature support
Python features can be installed in the following editions of Visual Studio as described in the installation guide:
Visual Studio 2015 and earlier are available at visualstudio.microsoft.com/vs/older-downloads/.
Features are fully supported and maintained for only the latest version of Visual Studio. Features are available in older versions but are not actively maintained.
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