Get Started on VS Code

This guide will walk you through the set-up process for building apps with Uno under Windows, Linux or macOS.

See these sections for information about using Uno Platform with:

Prerequisites

Visual Studio Code
The Uno Platform Visual Studio Code Extension
For Windows, install the GTK+ 3 runtime (See this uno-check issue)

Check your environment

Open a command-line prompt, Windows Terminal if you have it installed, or else Command Prompt or Windows Powershell from the Start menu.
Setup uno.check by:
- Installing the tool:
```
dotnet tool install -g uno.check
```
- Updating the tool, if you previously installed it:
```
dotnet tool update -g uno.check
```
Run the tool from the command prompt with the following command:
```
uno-check
```
Follow the instructions indicated by the tool.

Open a Terminal.
Setup uno.check by:
- Installing the tool:
```
dotnet tool install -g uno.check
```
- Updating the tool, if you previously installed it:
```
dotnet tool update -g uno.check
```
Run the tool from the command prompt with the following command:
```
uno-check
```
If the above command fails, use the following:
```
~/.dotnet/tools/uno-check
```
Follow the instructions indicated by the tool

Open a Terminal.
Setup uno.check by:
- Installing the tool:
```
dotnet tool install -g uno.check
```
- Updating the tool, if you previously installed it:
```
dotnet tool update -g uno.check
```
Run the tool from the command prompt with the following command:
```
uno-check
```
If the above command fails, use the following:
```
~/.dotnet/tools/uno-check
```
Follow the instructions indicated by the tool

You can find additional information about uno-check here.

Configure VS Code

If you are new to VS Code or to developing C# applications with VS Code take the time to follow the next steps.

Open VS Code
If this is not a new installation then try to update it. Press F1 and type Code: Check for Updates... and select it. A notification will tell you if an update is available.
Configure VS Code to start from the command-line using the code command. This can be configured by following these instructions.
Install the C# extension. Press F1 and type Extensions: Install Extensions, search the marketplace for C# and click the Install button.
Install the Uno Platform extension. Press F1 and type Extensions: Install Extensions, search the marketplace for Uno Platform and click the Install button.

No other extensions are needed to complete this guide.

C# Dev Kit Compatibility

At this time, the preview version of the C# Dev Kit extension ms-dotnettools.csdevkit is not compatible with the Uno Platform extension. It requires a preview version of the C# extension ms-dotnettools.csharp that contains major breaking changes.

You can use both the Uno Platform and C# Dev Kit extensions but not simultaneously. The easiest way to accomplish this is to create profiles inside VSCode. Using this method, you can:

Create one profile for Uno Platform
Disable, if installed, C# Dev Kit extension
Enable useOmnisharp inside the configuration
Create another profile for C# Dev Kit
Enable (or install) the C# Dev Kit extension
Ensure that useOmnisharp is disabled inside the configuration
Disable the Uno Platform extension

You can then switch between both profiles according to the type of dotnet project you are developing.

Platform specific setup

You may need to follow additional directions, depending on your development environment.

In order to run Skia+GTK heads, you will need to make sure to install the GTK3 runtime.

Tip

Once the GTK3 runtime is installed, you will need restart your IDE for the changes to take effect.

Install GTK3:

sudo apt update
sudo apt-get install gtk+3.0 mesa-utils libgl1-mesa-glx ttf-mscorefonts-installer

Update system and packages
```
pacman -Syu
```

Install the necessary dependencies

sudo pacman -S gtk3 dotnet-targeting-pack dotnet-sdk dotnet-host dotnet-runtime mono python mono-msbuild ninja gn aspnet-runtime

You may also need to install the Microsoft fonts manually.

In order to run Skia+GTK heads, you will need to make sure to install gtk+3 package using the following command line, using homebrew:

brew install gtk+3

Next Steps

You're all set! You can now create your first app with Uno Platform.