Visual Studio Code 2019 Mac



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Code snippets, often referred to as code templates, are useful for efficient programming as they allow the insertion and editing of pre-written blocks of code. Using code snippets can be convenient for quickly adding common patterns, or even for learning new patterns when as the developer you are unsure of syntax. There are templates provided for C#, F#, HTML, XML, Python, and Razor.

This section explains how to create, insert, and use snippets in code.

Inserting a snippet

There are some different ways to add code snippets, some of which are described below:

  • Tab Expansion – Start typing the template name, select it from the list and press Tab, Tab to add it:

  • Toolbox – Use the Toolbox Window to display a list of all code snippets. Drag any template from the toolbox into the correct position in the source code:

  • Insert Templates command – There is currently no default key binding set for inserting a template. To create one, browse to Visual Studio > Preferences > Key Bindings and search for template. This allows adding the desired key binding into the Edit Binding field, then click Apply:

Creating a new template

While there are many existing templates in a variety of languages that you can use and edit, new templates can also be added by navigating to Visual Studio > Preferences > Text Editor > Code Snippets:

Press the Add or Edit buttons to create or edit snippets.

Keywords in code snippets

After a code snippet is inserted into the editor, any keywords defined are highlighted and can be edited by tabbing between them. Keywords behave like a 'variable' in the code snippet and are defined by placing a dollar-sign $ before and after the name of the keyword.

The Edit template window is shown below, editing the built-in prop snippet. The snippet contains two keywords – $type$ and $name$ – which can have further properties set (such as a default value and tooltip) on the right side of the window:

The following fields are used to define a snippet:

  • Shortcut – The text the user types to insert the snippet.
  • Group – Snippets are grouped together in the snippet content menu, using this value.
  • Description – Explanation of the snippet's purpose.
  • Mime – Controls what file types the snippet is available in.
  • Is expandable template – Ensure this is checked so that the snippet can be inserted at the cursor by typing the shortcut.
  • Is surround with template – Check this option to list this shortcut in the Surround with... content menu in the editor.
  • Template text – The actual snippet that will be inserted into the editor. Keyword placeholders can be defined by surrounding a token with dollar signs eg. $type$.
  • Keyword property panel – On the right-side of the window, use the drop-down list at the top to choose a keyword (eg type) and edit properties like default value and tooltip.

Using keywords in the editor

To use a snippet with keywords, such as the one defined above, type the shortcut and press Tab twice, and the snippet contents will be inserted at the cursor:

Press the Tab key to move between object and MyProperty to customize the snippet for your class.

A keyword can be repeated in a snippet, such as this for example, notice the $i$ keyword appears 3 times:

When used in the editor, the Tab key will switch between the first i and max. If you overtype the i with a different variable name, all three instances will be updated:

Reserved keywords

There are two reserved keywords that you can use in a snippet:

  • $selected$ – If the snippet has Is surround with template checked, this keyword will be replaced by the text that was highlighted in the editor when the snippet was chosen.
  • $end$ – When the user has finished editing the keywords in a snippet, the cursor will be placed at the location of the $end$ keyword.

The for snippet in the previous section is an example of both these reserved keywords.

See also

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Visual Studio for Mac is a .NET integrated development environment on the Mac that can be used to edit, debug, and build code and then publish an app. In addition to a code editor and debugger, Visual Studio for Mac includes compilers, code completion tools, graphical designers, and source control features to ease the software development process.

Visual Studio for Mac supports many of the same file types as its Windows counterpart, such as .csproj, .fsproj, or .sln files, and supports features such as EditorConfig, meaning that you can use the IDE that works best for you.Creating, opening, and developing an app will be a familiar experience for anyone who has previously used Visual Studio on Windows. In addition, Visual Studio for Mac employs many of the powerful tools that make its Windows counterpart such a powerful IDE. The Roslyn Compiler Platform is used for refactoring and IntelliSense. Its project system and build engine use MSBuild, and its source editor uses the same foundation as Visual Studio on Windows. It uses the same debugger engines for Xamarin and .NET Core apps, and the same designers for Xamarin.iOS and Xamarin.Android.

What can I do in Visual Studio for Mac

Visual Studio for Mac supports the following types of development:

  • ASP.NET Core web applications with C#, F#, and support for Razor pages, JavaScript, and TypeScript
  • .NET Core console applications with C# or F#
  • Cross-platform Unity games and applications with C#
  • Android, iOS, tvOS, and watchOS applications in Xamarin with C# or F# and XAML
  • Cocoa desktop apps in C# or F#

This article explores various sections of Visual Studio for Mac, providing a look at some of the features that make it a powerful tool for creating these applications.

IDE tour

Visual Studio for Mac is organized into several sections for managing application files and settings, creating application code, and debugging.

Getting started

When you start Visual Studio 2019 for Mac for the first time, new users will see a sign-in window. Sign-in with your Microsoft account to activate a paid license (if you have one) or link to Azure subscriptions. You can press I'll do this later and sign in later via the Visual Studio > Sign in menu item:

You'll then be given the option to customize the IDE by selecting your preferred keyboard shortcuts: Visual Studio for Mac, Visual Studio, Visual Studio Code, or Xcode:

After this initial setup experience, you'll see the start window whenever you open Visual Studio 2019 for Mac, which shows a list of recent projects, and buttons to open an existing project or create a new one:

Solutions and projects

The following image shows Visual Studio for Mac with an application loaded:

The following sections provide an overview of the major areas in Visual Studio for Mac.

Solution Window

The Solution Window organizes the project(s) in a solution:

This is where files for the source code, resources, user interface, and dependencies are organized into platform-specific Projects.

For more information on using Projects and Solutions in Visual Studio for Mac, see the Projects and Solutions article.

Assembly references

Assembly references for each project are available under the References folder:

Additional references are added using the Edit References dialog, which is displayed by double-clicking on the References folder, or by selecting Edit References on its context menu actions:

For more information on using References in Visual Studio for Mac, see the Managing References in a Project article.

Dependencies / packages

Visual Studio Code For Mac

All external dependencies used in your app are stored in the Dependencies or Packages folder, depending on whether you are in a .NET Core or Xamarin.iOS/Xamarin.Android project. These are usually provided in the form of a NuGet.

Install Visual Studio For Mac

NuGet is the most popular package manager for .NET development. With Visual Studio's NuGet support, you can easily search for and add packages to your project to application.

To add a dependency to your application, right-click on the Dependencies / Packages folder, and select Add Packages:

Information on using a NuGet package in an application can be found in the Including a NuGet project in your project article.

Source Editor

Visual Studio Code 2019 Mac

Regardless of if you're writing in C#, XAML, or JavaScript, the code editor the shares the same core components with Visual Studio on Windows, with an entirely native user interface.

This brings some of the following features:

  • Native macOS (Cocoa-based) user interface (tooltips, editor surface, margin adornments, text rendering, IntelliSense)
  • IntelliSense type filtering and 'show import items'
  • Support for native text inputs
  • RTL/BiDi language support
  • Roslyn 3
  • Multi-caret support
  • Word wrap
  • Updated IntelliSense UI
  • Improved find/replace
  • Snippet support
  • Format selection
  • Inline lightbulbs

For more information on using the Source Editor in Visual Studio for Mac, see the Source Editor documentation.

To keep tabs visible at all times, you can take advantage of pinning them. This ensures that every time you launch a project, the tab you need will always appear. To pin a tab, hover over the tab and click the pin icon:

Refactoring

Visual Studio for Mac provides two useful ways to refactor your code: Context Actions, and Source Analysis. You can read more about them in the Refactoring article.

Debugging

Visual Studio for Mac has debuggers that support .NET Core, .NET Framework, Unity, and Xamarin projects. Visual Studio for Mac uses the .NET Core debugger and the Mono Soft Debugger, allowing the IDE to debug managed code across all platforms. For additional information on debugging, visit the Debugging article.

The debugger contains rich visualizers for special types such as strings, colors, URLs, as well as sizes, coordinates, and bézier curves.

For more information on the debugger's data visualizations, visit the Data Visualizations article.

Version control

Visual Studio for Mac integrates with Git and Subversion source control systems. Projects under source control are denoted with the branch listed next to the Solution name:

Files with uncommitted changes have an annotation on their icons in the Solution Window, as illustrated in the following image:

For more information on using version control in Visual Studio, see the Version Control article.

Visual Studio C++ For Mac

Next steps

Visual Studio 2019 Mac Code Coverage

Related Video

Visual Studio For Mac Download

See also