JetBrains Rider Setup
  1. 1.
    Download and install .NET 5 SDK Download .NET (Linux, macOS, and Windows) (microsoft.com)​
    This is the runtime, development kit (compiler, etc) that is used to build Avalonia applications.
  2. 2.
    Install Avalonia Templates
    Run the command dotnet new -i Avalonia.Templates from the command prompt on your machine.
    The output will look similar to this.
    $ dotnet new -i Avalonia.Templates
    Determining projects to restore...
    Restored /Users/danwalmsley/.templateengine/dotnetcli/v5.0.200/scratch/restore.csproj (in 706 ms).
    ​
    Templates Short Name Language Tags
    .....
    ​
    Avalonia Resource Dictionary avalonia.resource ui/xaml/avalonia/avaloniaui
    Avalonia Styles avalonia.styles ui/xaml/avalonia/avaloniaui
    ​
    Examples:
    dotnet new mvc --auth Individual
    dotnet new mstest
    dotnet new --help
    dotnet new avalonia.mvvm --help
    $
  3. 3.
    Rider will give you the very best development experience available for Avalonia. It is available for Windows, Linux, and macOS.
    Rider supports XAML out of the box. However, if you want to use the XAML previewer, you need the Avalonia plugin.
  4. 4.
    Install the Avalonia Plugin
    Once Rider loads you will see the Welcome Screen. Click the Configure dropdown and select Plugins.
rider-welcome
A new Preferences Screen will open up. Click the Settings icon as shown and select Manage Plugin Repositories...
configure-plugin-repos
Click the + icon and enter the URL https://plugins.jetbrains.com/plugins/dev/14839 then click OK:
enter-plugin-repo
Now click on the Marketplace tab and search for Avalonia. Select AvaloniaRider and click Install; once that's done, click the Restart IDE button that appears.
plugin-install
Now Rider should be ready to develop Avalonia applications.
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