c# - Determine screen size with .NET Core 5?

Question

How to determine the screen size with .NET Core? I want to take a screenshot as described in DotNetCore Capture A Screenshot in Windows but they use a fixed 1920*1080 resolution which does not work for my purposes.

Do I have to reference System.Windows.Forms and thereby being nailed down to Windows?

Before switching to .NET Core we used System.Windows.Forms like so:

new Size
{
  Width = Screen.AllScreens.Sum(s => s.Bounds.Width),
  Height = Screen.AllScreens.Max(s => s.Bounds.Height)
}

Which is something we could use again, but we would love something platform-independent of course.

Answer 1

The comments hint that it is not supported yet.

So I show you what we have done to implement it using Windows Forms (took me some time to understand how to reference Windows Forms in a .NET Core library project correctly):

You can add the Windows Forms dependency like so to the csproj file:

<ItemGroup>
  <FrameworkReference Include="Microsoft.WindowsDesktop.App.WindowsForms" />
</ItemGroup>

Then you can use the Screen class again:

new Size
{
  Width = Screen.AllScreens.Sum(s => s.Bounds.Width),
  Height = Screen.AllScreens.Max(s => s.Bounds.Height)
}

IMPORTANT: This works on Windows only, but at least it is .NET Core compatible.