..

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ArchiveFileListView.xaml.cs

@@ -15,9 +15,16 @@ namespace QuickLook.Plugin.ArchiveViewer
 
         public void Dispose()
         {
+            GC.SuppressFinalize(this);
+
             IconManager.ClearCache();
         }
 
+        ~ArchiveFileListView()
+        {
+            Dispose();
+        }
+
         public void SetDataContext(object context)
         {
             treeGrid.DataContext = context;

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ArchiveInfoPanel.xaml.cs

@@ -28,9 +28,16 @@ namespace QuickLook.Plugin.ArchiveViewer
 
         public void Dispose()
         {
+            GC.SuppressFinalize(this);
+
             fileListView.Dispose();
         }
 
+        ~ArchiveInfoPanel()
+        {
+            Dispose();
+        }
+
         private void LoadArchive(string path)
         {
             LoadItemsFromArchive(path);

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/Plugin.cs

@@ -16,10 +16,9 @@ namespace QuickLook.Plugin.ArchiveViewer
             if (Directory.Exists(path))
                 return false;
 
-            SevenZipExtractor archive = null;
             try
             {
-                using (archive = new SevenZipExtractor(path))
+                using (var archive = new SevenZipExtractor(path))
                 {
                     // dummy access to the data. If it throws exception, return false
                     if (archive.ArchiveFileData == null)
@@ -42,10 +41,6 @@ namespace QuickLook.Plugin.ArchiveViewer
             {
                 return false;
             }
-            finally
-            {
-                archive?.Dispose();
-            }
 
             return true;
         }
@@ -63,9 +58,16 @@ namespace QuickLook.Plugin.ArchiveViewer
             container.Title = $"{Path.GetFileName(path)}";
         }
 
-        public void Close()
+        public void Dispose()
         {
-            _panel.Dispose();
+            GC.SuppressFinalize(this);
+
+            _panel?.Dispose();
+        }
+
+        ~Plugin()
+        {
+            Dispose();
         }
     }
 }

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/QuickLook.Plugin.ArchiveViewer.csproj

@@ -36,6 +36,7 @@
     <Reference Include="PresentationFramework" />
     <Reference Include="SevenZipSharp">
       <HintPath>References\SevenZipSharp.dll</HintPath>
+      <EmbedInteropTypes>False</EmbedInteropTypes>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />