[Refactor] Use collection expressions.

Aaru.Gui/ViewModels/Windows/ImageSidecarViewModel.cs

@@ -31,7 +31,6 @@
 // ****************************************************************************/
 
 using System;
-using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Reactive;
@@ -331,10 +330,13 @@ public sealed class ImageSidecarViewModel : ViewModelBase
         dlgDestination.Filters?.Add(new FileDialogFilter
         {
             Name = UI.Dialog_Aaru_Metadata,
-            Extensions = new List<string>(new[]
-            {
-                "*.json"
-            })
+            Extensions =
+            [
+                ..new[]
+                {
+                    "*.json"
+                }
+            ]
         });
 
         string result = await dlgDestination.ShowAsync(_view);