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For instructions on how to view and download sample code, see the Viewing and downloading samples section.NET Samples. Unit Testing in.NET Core using dotnet test. This guide shows you how to create an ASP.NET Core web app and associated unit tests. It starts by creating a simple web service app and then adds tests. Expression web 4.0 free download. Development Tools downloads - Microsoft Expression Web by Microsoft and many more programs are available for instant and free download.

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The .NET documentation contains a set of samples and tutorials that teach you about .NET. This article describes how to find, view, and download .NET, ASP.NET Core, and C# samples and tutorials. Find resources to learn the F# programming language on the F# Foundation's site. If you're interested in exploring C# using an online code editor, start with this interactive tutorial and continue with C# interactive tutorial. For instructions on how to view and download sample code, see the Viewing and downloading samples section.

.NET

Samples

This guide shows you how to create an ASP.NET Core web app and associated unit tests. It starts by creating a simple web service app and then adds tests. It continues with creating more tests to guide implementing new features. The completed sample is available in the dotnet/samples repository on GitHub.

Tutorials

This tutorial shows how to create and run a .NET console application by using Visual Studio Code and the .NET CLI. Project tasks, such as creating, compiling, and running a project are done by using the .NET CLI.

This tutorial shows how to write libraries for .NET using Visual Studio Code and the .NET CLI. Project tasks, such as creating, compiling, and running a project are done by using the .NET CLI.

For more .NET tutorials, see Learn .NET and the .NET SDK tools.

ASP.NET Core

See the ASP.NET Core tutorials. Many articles in the ASP.NET Core documentation have links to samples written for them.

C# language

Samples

This sample demonstrates the syntax and features for creating and consuming C# iterators. The completed sample is available in the dotnet/samples repository on GitHub.

This sample demonstrates the syntax and features for C# indexers. The completed sample is available in the dotnet/samples repository on GitHub.

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This sample demonstrates the syntax and features for C# delegates and events. The completed sample is available in the dotnet/samples repository on GitHub. A second sample focused on events is also in the same repository.

This sample demonstrates many of the problems that can be solved by using Expression Trees. The completed sample is available in the dotnet/samples repository on GitHub.

LINQ Samples

This series of samples demonstrate many of the features of Language Integrated Query (LINQ). The completed sample is available in the dotnet/samples repository on GitHub.

Managed COM server Sample

The COM server sample demonstrates the creation of a managed COM server and how it can be globally registered or consumed via RegFree COM.

Microsoft Office PIA Sample

The ExcelDemo sample demonstrates the consumption of Microsoft Office PIAs in .NET Core.

Tutorials

This tutorial demonstrates Console I/O, the structure of a console app, and the basics of the task-based asynchronous programming model. The completed sample is available in the dotnet/samples repository on GitHub.

This tutorial demonstrates web communications, JSON serialization, and object-oriented features of the C# language. The completed sample is available in the dotnet/samples repository on GitHub.

This tutorial demonstrates many of the features of LINQ and the language elements that support it. The completed sample is available in the dotnet/samples repository on GitHub.

This tutorial shows you how to build a simple .NET console app using Visual Studio for Mac.

This tutorial shows you how to build a .NET class library using Visual Studio for Mac.

This tutorial shows you how to build a simple application on .NET Core that supports a plugin architecture. The completed sample is available in the dotnet/samples repository on GitHub.

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Deploy to containers

This tutorial demonstrates how to deploy an existing ASP.NET MVC app in a Windows Docker Container.

View and download samples

Many topics show source code and samples that are available for viewing or download from GitHub. To view a sample, just follow the sample link. To download the code, follow these instructions:

  1. Download the repository that contains the sample code by performing one of the following procedures:
    • Download a ZIP of the repository to your local system. Un-ZIP the compressed archive.
    • Fork the repository and clone the fork to your local system. Forking and cloning permits you to make contributions to the documentation by committing changes to your fork and then creating a pull request for the official docs repository. For more information, see the .NET Documentation Contributing Guide and the ASP.NET Core Docs Contributing Guide.
    • Clone the repository locally. If you clone a docs repository directly to your local system, you won't be able to make commits directly against the official repository, so you won't be able to make documentation contributions later. Use the fork and clone procedure previously described if you want to preserve the opportunity to contribute to the documentation later.
  2. Navigate within the repository's folders to the sample's location. The relative path to the sample's location appears in your browser's address bar when you follow the link to the sample.
  3. To run a sample, you have several options:
    • Use the .NET CLI: In a console window, navigate to the sample's folder and use dotnet CLI commands.
    • Use Visual Studio or Visual Studio for Mac: Open the sample by selecting File > Open > Project/Solution from the menu bar, navigate to the sample project folder, and select the project file (.csproj or .fsproj).
    • Use Visual Studio Code: Open the sample by selecting File > Open Folder from the menu bar and selecting the sample's project folder.
    • Use a different IDE that supports .NET projects.
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Developer Community System Requirements Compatibility Distributable Code License Terms Blogs Latest Release Known Issues

Important

This release is not 'go-live' and not intended for use on production computers or for creating production code. For instructions on installing and updating Visual Studio 2019, see this documentation on updating Visual Studio 2019 to the most recent release.

What's New in Visual Studio 2019 v16.10 Preview

Visual Studio 2019 v16.10 Preview Releases

  • March 02, 2021 — Visual Studio 2019 version 16.10 Preview 1

Visual Studio 2019 Blog

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The Visual Studio 2019 Blog is the official source of product insight from the Visual Studio Engineering Team. You can find in-depth information about the Visual Studio 2019 releases in the following posts:

Visual Studio 2019 version 16.10 Preview 1

released March 02, 2021

Summary of What's New in this Release of Visual Studio 2019 version 16.10 Preview 1

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.NET Productivity:

  • Remove Unused References
  • Smart Break Line
  • Simplify LINQ expression refactoring
  • IntelliSense completion for Enum values
  • IntelliSense completion mode setting
  • Code style preference for new lines
  • Find All References support for Source Generators

Web Tools:

  • Switch to V2 of API for Azure AD provisioning
  • Azure App Configuration as a Connected Service now supports dynamic configuration

Git Productivity

  • Improved performance and reliability for source control glyphs in Solution Explorer.
  • Preserve incoming/outgoing sections in Git Repository window even when empty.
  • Consolidated Fetch/Pull/Push dropdowns for multiple remotes in Git Changes window to a single Action menu.
  • Diagnostic Analysis of memory dumps now includes Managed Linux core dumps.

Issues Addressed in this Release

From Developer Community

Details of What's New in Visual Studio 2019 version 16.10 Preview 1

.NET Productivity

  • We added a Remove Unused References command that allows you to clean up project references and NuGet packages that have no usage. This option is off by default so you will need to enable it in Tools > Options > Text Editor > C# > Advanced and select Show “remove Unused References” command in Solution Explorer (experimental). Once the option is enabled the Remove Unused References command will appear in the right-click menu of a project name or dependencies node in Solution Explorer:
Remove Unused References command

Selecting Remove Unused References will open a dialog where you can view all references that are going to be removed with an option to preserve the ones that you want to keep:

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Remove Unused References dialog
  • We added a new command called Smart Break Line that automatically inserts a set of braces and places the caret within those braces when using Shift+Enter as a commit character. Smart Break Line works for all type declarations that require braces as well as properties, events, fields, and object creation expressions. The example below shows Smart Break Line used on a class and a field. If the field doesn’t have a semicolon at the end, typing Shift+Enter will convert the field to a property by adding a set of braces. You can press Shift+Enter again to undo the commit which will also automatically add a semicolon at the end of the field:
Smart Break Line
  • There is now a refactoring to simplify LINQ expressions which will remove the unnecessary call to the Enumerable for the .Where() method to help improve performance and readability. Place your cursor on the LINQ expression. Press (Ctrl+.) to trigger the Quick Actions and Refactorings menu. Select Simplify LINQ expression.
Simplify LINQ Expression
  • There is now IntelliSense completion for Enum values when a type is known even if the Enum name is not entered.

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IntelliSense completion for Enum values
  • We added a new IntelliSense completion mode setting that gives you the ability to set default completion options. This new setting is available in Tools > Options > Text Editor > Advanced > Default IntelliSense completion mode where you can choose from the following options: Last used which will preserve the last setting you used with Ctrl+Alt+Space, Tab-only which will only complete on tab, and Automatic which is currently the default behavior that will complete on punctuation and special characters.
IntelliSense completion mode setting

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  • We added new code style preferences for new lines. You can configure these preferences with an EditorConfig file or within Tools > Options > Text Editor > C# > Code Style > New line preferences (experimental).
Code style options for new lines

For example, you can set your code style preference to report a diagnostic and offer a code fix to remove extra blank lines:

Code fix remove extra blank lines
  • There is now Find All References support for Source Generators that allows you to find references in a source generated document.

Debugger & Diagnostics

  • We have developed several analyzer to help catch common issues in managed memory dumps. This analysis can now be performed on managed Linux core dumps.
Diagnostics Analysis
Thank you

Last but certainly not least, a big Thank You to the following people who contributed this month to .NET Productivity (a.k.a. Roslyn):

  • Benjamin Schäublin (@bschaeublin):
    • Fixed redundant text in remark for MetadataReference overload PR #51242
  • Martin Strecker (@MaStr11):
    • Redundant cast false positive for IntPtr, nint, and int PR #51230 and PR #51209
    • Fixed CI badges in README PR #51085
  • piotrstenke (@piotrstenke):
    • Updated properties pointing to themself in the tag in GeneratorContexts.cs PR #50896
  • Huo Yaoyuan (@huoyaoyuan):
    • Updated keyword recommender to know about structs readonly members PR #50820
  • Yair Halberstadt (@YairHalberstadt):
    • Support for mixed declaration and assignment in deconstruction PR #44476
  • Youssef Victor (@Youssef1313):
    • Added #nullable enable to PublicAPI.(Un)shipped.txt PR #50793
    • Support for records in CSharpGenerateDefaultConstructorsService PR #50524
    • Added new line formatting option for records PR #50274

Web Tools

Dynamic configuration allows for configuration resources to be refreshed automatically using a middleware. App Configuration as a Connected Service can now automatically integrate dynamic configuration into your application. To use this connected service, click on Connected Services and add Azure App Configuration as a Service Dependency.

Known Issues

See all open issues and available workarounds in Visual Studio 2019 by following the below link.

Feedback and suggestions

We would love to hear from you! For issues, let us know through the Report a Problem option in the upper right-handcorner of either the installer or the Visual Studio IDE itself. The icon is located in the upper right-hand corner.You can make a product suggestion or track your issues in the Visual Studio Developer Community, where you can ask questions, find answers, and propose new features.You can also get free installation help through our Live Chat support.

Blogs

Take advantage of the insights and recommendations available in the Developer Tools Blogs site to keep you up-to-date on all new releases and include deep dive posts on a broad range of features.

Visual Studio 2019 Release Notes History

For more information relating to past versions of Visual Studio 2019, see the Visual Studio 2019 Release Notes History page.

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