Add a crummy dispose hack

Replace Thread with Task in recycle bin updater

Author: jzebedee

WinDirStat.Net.Wpf.Base/ViewModel/MainViewModel.Commands.cs

@@ -1,6 +1,7 @@
 using Microsoft.Toolkit.Mvvm.Input;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using WinDirStat.Net.Model.Drives;
 using WinDirStat.Net.Model.Files;
@@ -137,7 +138,7 @@ private void OnClose() {
 		private void OnCancel() {
 			Scanning.Cancel(false);
 		}
-		private void OnElevate() {
+		private async void OnElevate() {
 			// Dialog warn progress will be lost.
 			// If yes, close then start new process.
 			MessageBoxResult result = MessageBoxResult.Yes;
@@ -150,16 +151,16 @@ private void OnElevate() {
 				try {
 					OS.StartNewElevated();
 					UI.Shutdown();
-					Dispose();
+					await DisposeAsync();
 				}
 				catch {
 					Dialogs.ShowError(WindowOwner, "Failed to start elevated process!", "Error");
 				}
 			}
 		}
-		private void OnExit() {
+		private async void OnExit() {
 			UI.Shutdown();
-			Dispose();
+			await DisposeAsync();
 		}
 
 		#endregion

WinDirStat.Net.Wpf.Base/ViewModel/MainViewModel.cs

@@ -5,6 +5,7 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
+using System.Threading.Tasks;
 using WinDirStat.Net.Model.Files;
 using WinDirStat.Net.Rendering;
 using WinDirStat.Net.Services;
@@ -15,7 +16,7 @@
 
 namespace WinDirStat.Net.ViewModel {
     /// <summary>The main view model for the program.</summary>
-    public partial class MainViewModel : ViewModelWindow {
+    public partial class MainViewModel : ViewModelWindow, IAsyncDisposable {
 
         #region Fields
 
@@ -51,12 +52,12 @@ public partial class MainViewModel : ViewModelWindow {
 
         private bool suppressRefresh;
 
-        private Thread recycleInfoThread;
-
-        private readonly object recycleLock = new object();
+        private Task recycleInfoTask;
 
         private Stopwatch lastRecycleWatch;
 
+        private bool disposed;
+
         #endregion
 
         #region Constructors
@@ -367,15 +368,23 @@ private void OnSelectedFilesChanged(object sender, NotifyCollectionChangedEventA
 
         #endregion
 
-        #region IDisposable Implementation
+        #region IAsyncDisposable Implementation
+
+        public async ValueTask DisposeAsync() {
+            if (disposed)
+                return;
 
-        public void Dispose() {
-            using (Scanning) {
+            disposed = true;
+            await using (Scanning) {
                 statusTimer.Stop();
                 ramTimer.Stop();
             }
+
+            GC.SuppressFinalize(this);
         }
 
+        public async void Dispose() => await DisposeAsync();
+
         #endregion
 
     }