It had to be an interface. Just spotted the typo.

Gness Erquint · Gness Erquint · commit 7ef4211b56b4 · 2024-11-04T03:14:46.000+03:00
diff --git a/src/Files.App/Actions/Show/ToggleSidebarAction.cs b/src/Files.App/Actions/Show/ToggleSidebarAction.cs
@@ -6,7 +6,7 @@ namespace Files.App.Actions
 	internal sealed class ToggleSidebarAction : ObservableObject, IToggleAction
 	{
 		private readonly IAppearanceSettingsService AppearanceSettingsService = Ioc.Default.GetRequiredService<IAppearanceSettingsService>();
-		private readonly SidebarViewModel SidebarViewModel = Ioc.Default.GetRequiredService<SidebarViewModel>();
+		private readonly ISidebarViewModel SidebarViewModel = Ioc.Default.GetRequiredService<SidebarViewModel>();
 
 		public string Label
 			=> "ToggleSidebar".GetLocalizedResource();

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ namespace Files.App.Actions`
`6`	`6`	`internal sealed class ToggleSidebarAction : ObservableObject, IToggleAction`
`7`	`7`	`{`
`8`	`8`	`private readonly IAppearanceSettingsService AppearanceSettingsService = Ioc.Default.GetRequiredService<IAppearanceSettingsService>();`
`9`		`- private readonly SidebarViewModel SidebarViewModel = Ioc.Default.GetRequiredService<SidebarViewModel>();`
	`9`	`+ private readonly ISidebarViewModel SidebarViewModel = Ioc.Default.GetRequiredService<SidebarViewModel>();`
`10`	`10`
`11`	`11`	`public string Label`
`12`	`12`	`=> "ToggleSidebar".GetLocalizedResource();`