diff --git a/Directory.Build.props b/Directory.Build.props
index f40331e7f..9c777ba79 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <LangVersion>Latest</LangVersion>
-        <NoWarn>CA1051;CA1707;CA1711;CA1801;$(NoWarn)</NoWarn>
+        <NoWarn>CA1051;CA1501;CA1707;CA1711;CA1801;$(NoWarn)</NoWarn>
     </PropertyGroup>
 
     <PropertyGroup>
diff --git a/source/Cosmos.Build.Builder/App.xaml.cs b/source/Cosmos.Build.Builder/App.xaml.cs
index 447d80be9..362e3fa44 100644
--- a/source/Cosmos.Build.Builder/App.xaml.cs
+++ b/source/Cosmos.Build.Builder/App.xaml.cs
@@ -90,7 +90,7 @@ namespace Cosmos.Build.Builder
             base.OnStartup(e);
         }
 
-        private void ShowErrorMessageBox(string message) =>
+        private static void ShowErrorMessageBox(string message) =>
             MessageBox.Show(message, "Cosmos Kit Builder", MessageBoxButton.OK, MessageBoxImage.Error);
     }
 }
diff --git a/source/Cosmos.Build.Builder/BuildTasks/BuildTask.cs b/source/Cosmos.Build.Builder/BuildTasks/BuildTask.cs
index 249d44d03..bc4629d58 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/BuildTask.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/BuildTask.cs
@@ -17,7 +17,7 @@ namespace Cosmos.Build.Builder.BuildTasks
 
         protected override IReadOnlyDictionary<string, string> Properties => _properties;
 
-        private Dictionary<string, string> _properties;
+        private readonly Dictionary<string, string> _properties;
 
         public BuildTask(
             IMSBuildService msBuildService,
@@ -28,9 +28,11 @@ namespace Cosmos.Build.Builder.BuildTasks
         {
             ProjectFilePath = projectFilePath;
 
-            _properties = new Dictionary<string, string>();
-            _properties.Add("OutputPath", outputPath);
-            _properties.Add("VsixOutputPath", vsixOutputPath);
+            _properties = new Dictionary<string, string>()
+            {
+                ["OutputPath"] = outputPath,
+                ["VsixOutputPath"] = vsixOutputPath
+            };
         }
     }
 }
diff --git a/source/Cosmos.Build.Builder/BuildTasks/CreateSetupTask.cs b/source/Cosmos.Build.Builder/BuildTasks/CreateSetupTask.cs
index f1ac19f7a..96d03533c 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/CreateSetupTask.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/CreateSetupTask.cs
@@ -10,11 +10,10 @@ namespace Cosmos.Build.Builder.BuildTasks
     {
         public override string Name => "Create Setup";
 
-        private IInnoSetupService _innoSetupService;
+        private readonly IInnoSetupService _innoSetupService;
 
-        private string _scriptFilePath;
-
-        private Dictionary<string, string> _defines;
+        private readonly string _scriptFilePath;
+        private readonly Dictionary<string, string> _defines;
 
         public CreateSetupTask(
             IInnoSetupService innoSetupService,
@@ -27,10 +26,11 @@ namespace Cosmos.Build.Builder.BuildTasks
 
             _scriptFilePath = scriptFilePath;
 
-            _defines = new Dictionary<string, string>();
-
-            _defines.Add("BuildConfiguration", configuration);
-            _defines.Add("ChangeSetVersion", releaseVersion);
+            _defines = new Dictionary<string, string>()
+            {
+                ["BuildConfiguration"] = configuration,
+                ["ChangeSetVersion"] = releaseVersion
+            };
         }
 
         protected override string GetExePath()
diff --git a/source/Cosmos.Build.Builder/BuildTasks/MSBuildTargetBuildTaskBase.cs b/source/Cosmos.Build.Builder/BuildTasks/MSBuildTargetBuildTaskBase.cs
index 926329c63..29d4f98a6 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/MSBuildTargetBuildTaskBase.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/MSBuildTargetBuildTaskBase.cs
@@ -12,7 +12,7 @@ namespace Cosmos.Build.Builder.BuildTasks
 
         protected abstract IReadOnlyDictionary<string, string> Properties { get; }
 
-        private IMSBuildService _msBuildService;
+        private readonly IMSBuildService _msBuildService;
 
         protected MSBuildTargetBuildTaskBase(IMSBuildService msBuildService)
             : base(true, false)
diff --git a/source/Cosmos.Build.Builder/BuildTasks/PackTask.cs b/source/Cosmos.Build.Builder/BuildTasks/PackTask.cs
index bab999a32..6f620853f 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/PackTask.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/PackTask.cs
@@ -17,7 +17,7 @@ namespace Cosmos.Build.Builder.BuildTasks
 
         protected override IReadOnlyDictionary<string, string> Properties => _properties;
 
-        private Dictionary<string, string> _properties;
+        private readonly Dictionary<string, string> _properties;
 
         public PackTask(
             IMSBuildService msBuildService,
diff --git a/source/Cosmos.Build.Builder/BuildTasks/ProcessBuildTaskBase.cs b/source/Cosmos.Build.Builder/BuildTasks/ProcessBuildTaskBase.cs
index d99bbabbd..781fb2571 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/ProcessBuildTaskBase.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/ProcessBuildTaskBase.cs
@@ -10,8 +10,8 @@ namespace Cosmos.Build.Builder.BuildTasks
     {
         public abstract string Name { get; }
 
-        private bool _waitForExit;
-        private bool _createWindow;
+        private readonly bool _waitForExit;
+        private readonly bool _createWindow;
 
         protected ProcessBuildTaskBase(bool waitForExit, bool createWindow)
         {
@@ -56,7 +56,7 @@ namespace Cosmos.Build.Builder.BuildTasks
         protected abstract string GetExePath();
         protected abstract string GetArguments();
 
-        private void WaitForExit(Process process)
+        private static void WaitForExit(Process process)
         {
             process.WaitForExit();
 
@@ -66,7 +66,7 @@ namespace Cosmos.Build.Builder.BuildTasks
             }
         }
 
-        private async Task ReadOutputAsync(StreamReader reader, ILogger logger)
+        private static async Task ReadOutputAsync(StreamReader reader, ILogger logger)
         {
             while (true)
             {
diff --git a/source/Cosmos.Build.Builder/BuildTasks/PublishTask.cs b/source/Cosmos.Build.Builder/BuildTasks/PublishTask.cs
index 40d31a2d5..ec7916a12 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/PublishTask.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/PublishTask.cs
@@ -17,7 +17,7 @@ namespace Cosmos.Build.Builder.BuildTasks
 
         protected override IReadOnlyDictionary<string, string> Properties => _properties;
 
-        private Dictionary<string, string> _properties;
+        private readonly Dictionary<string, string> _properties;
 
         public PublishTask(
             IMSBuildService msBuildService,
@@ -27,8 +27,10 @@ namespace Cosmos.Build.Builder.BuildTasks
         {
             ProjectFilePath = projectFilePath;
 
-            _properties = new Dictionary<string, string>();
-            _properties.Add("PublishDir", publishOutputPath);
+            _properties = new Dictionary<string, string>()
+            {
+                ["PublishDir"] = publishOutputPath
+            };
         }
     }
 }
diff --git a/source/Cosmos.Build.Builder/BuildTasks/StartProcessTask.cs b/source/Cosmos.Build.Builder/BuildTasks/StartProcessTask.cs
index c8e309987..f9cdce53b 100644
--- a/source/Cosmos.Build.Builder/BuildTasks/StartProcessTask.cs
+++ b/source/Cosmos.Build.Builder/BuildTasks/StartProcessTask.cs
@@ -6,10 +6,10 @@ namespace Cosmos.Build.Builder.BuildTasks
     {
         public override string Name => $"Run Process - {_processName ?? Path.GetFileNameWithoutExtension(_exePath)}";
 
-        private string _exePath;
-        private string _args;
+        private readonly string _exePath;
+        private readonly string _args;
 
-        private string _processName;
+        private readonly string _processName;
 
         public StartProcessTask(
             string exePath,
diff --git a/source/Cosmos.Build.Builder/CommandLineBuilderConfiguration.cs b/source/Cosmos.Build.Builder/CommandLineBuilderConfiguration.cs
index 30b48f8cd..c5472a926 100644
--- a/source/Cosmos.Build.Builder/CommandLineBuilderConfiguration.cs
+++ b/source/Cosmos.Build.Builder/CommandLineBuilderConfiguration.cs
@@ -10,7 +10,7 @@ namespace Cosmos.Build.Builder
         public bool UserKit => GetSwitch();
         public string VsPath => GetOption();
 
-        private Dictionary<string, string> _args;
+        private readonly Dictionary<string, string> _args;
 
         public CommandLineBuilderConfiguration(string[] args)
         {
diff --git a/source/Cosmos.Build.Builder/CosmosBuildDefinition.cs b/source/Cosmos.Build.Builder/CosmosBuildDefinition.cs
index ad6ce5780..233261565 100644
--- a/source/Cosmos.Build.Builder/CosmosBuildDefinition.cs
+++ b/source/Cosmos.Build.Builder/CosmosBuildDefinition.cs
@@ -12,9 +12,9 @@ namespace Cosmos.Build.Builder
 {
     internal class CosmosBuildDefinition : IBuildDefinition
     {
-        private IInnoSetupService _innoSetupService;
-        private IMSBuildService _msBuildService;
-        private ISetupInstance2 _visualStudioInstance;
+        private readonly IInnoSetupService _innoSetupService;
+        private readonly IMSBuildService _msBuildService;
+        private readonly ISetupInstance2 _visualStudioInstance;
 
         private readonly string _cosmosDir;
 
diff --git a/source/Cosmos.Build.Builder/Dependencies/InnoSetupDependency.cs b/source/Cosmos.Build.Builder/Dependencies/InnoSetupDependency.cs
index c1bade0ec..806b605df 100644
--- a/source/Cosmos.Build.Builder/Dependencies/InnoSetupDependency.cs
+++ b/source/Cosmos.Build.Builder/Dependencies/InnoSetupDependency.cs
@@ -12,9 +12,10 @@ namespace Cosmos.Build.Builder.Dependencies
     internal class InnoSetupDependency : IDependency
     {
         private const string InnoSetupInstallerUrl = "http://www.jrsoftware.org/download.php/is.exe";
+
         public string Name => "Inno Setup";
 
-        private IInnoSetupService _innoSetupService;
+        private readonly IInnoSetupService _innoSetupService;
 
         public InnoSetupDependency(IInnoSetupService innoSetupService)
         {
@@ -46,7 +47,7 @@ namespace Cosmos.Build.Builder.Dependencies
             }
 
             var process = Process.Start(setupFilePath);
-            await Task.Run((Action)process.WaitForExit, cancellationToken).ConfigureAwait(false);
+            await Task.Run(process.WaitForExit, cancellationToken).ConfigureAwait(false);
 
             if (process.ExitCode != 0)
             {
diff --git a/source/Cosmos.Build.Builder/Dependencies/ReposDependency.cs b/source/Cosmos.Build.Builder/Dependencies/ReposDependency.cs
index b5212afb2..44bfa9573 100644
--- a/source/Cosmos.Build.Builder/Dependencies/ReposDependency.cs
+++ b/source/Cosmos.Build.Builder/Dependencies/ReposDependency.cs
@@ -48,12 +48,12 @@ namespace Cosmos.Build.Builder.Dependencies
                 .Select(r => DownloadRepoAsync(r, usesGit, cancellationToken)));
         }
 
-        private async Task DownloadRepoAsync(Repo repo, bool useGit, CancellationToken cancellationToken)
+        private static async Task DownloadRepoAsync(Repo repo, bool useGit, CancellationToken cancellationToken)
         {
             if (useGit)
             {
                 var process = Process.Start("git", $"clone \"{repo.Url}.git\" \"{repo.LocalPath}\"");
-                await Task.Run((Action)process.WaitForExit).ConfigureAwait(false);
+                await Task.Run(process.WaitForExit).ConfigureAwait(false);
 
                 if (process.ExitCode != 0)
                 {
diff --git a/source/Cosmos.Build.Builder/Dependencies/VisualStudioDependency.cs b/source/Cosmos.Build.Builder/Dependencies/VisualStudioDependency.cs
index 8fb5e28c0..abdfa7968 100644
--- a/source/Cosmos.Build.Builder/Dependencies/VisualStudioDependency.cs
+++ b/source/Cosmos.Build.Builder/Dependencies/VisualStudioDependency.cs
@@ -12,7 +12,7 @@ namespace Cosmos.Build.Builder.Dependencies
 
         public string Name => $"Visual Studio {MinimumVsVersion.Major}.{MinimumVsVersion.Minor}+";
 
-        private ISetupInstance2 _visualStudioInstance;
+        private readonly ISetupInstance2 _visualStudioInstance;
 
         public VisualStudioDependency(ISetupInstance2 visualStudioInstance)
         {
@@ -41,7 +41,7 @@ namespace Cosmos.Build.Builder.Dependencies
             var args = $"update --passive --norestart --installPath \"{vsInstancePath}\"";
 
             var process = Process.Start(vsInstallerPath, args);
-            await Task.Run((Action)process.WaitForExit, cancellationToken).ConfigureAwait(false);
+            await Task.Run(process.WaitForExit, cancellationToken).ConfigureAwait(false);
 
             if (process.ExitCode != 0)
             {
diff --git a/source/Cosmos.Build.Builder/Dependencies/VisualStudioWorkloadsDependency.cs b/source/Cosmos.Build.Builder/Dependencies/VisualStudioWorkloadsDependency.cs
index 276699b32..42a580674 100644
--- a/source/Cosmos.Build.Builder/Dependencies/VisualStudioWorkloadsDependency.cs
+++ b/source/Cosmos.Build.Builder/Dependencies/VisualStudioWorkloadsDependency.cs
@@ -20,7 +20,7 @@ namespace Cosmos.Build.Builder.Dependencies
 
         public string Name => "Visual Studio Workloads";
 
-        private ISetupInstance2 _visualStudioInstance;
+        private readonly ISetupInstance2 _visualStudioInstance;
 
         public VisualStudioWorkloadsDependency(ISetupInstance2 visualStudioInstance)
         {
@@ -52,7 +52,7 @@ namespace Cosmos.Build.Builder.Dependencies
             }
 
             var process = Process.Start(vsInstallerPath, args);
-            await Task.Run((Action)process.WaitForExit, cancellationToken).ConfigureAwait(false);
+            await Task.Run(process.WaitForExit, cancellationToken).ConfigureAwait(false);
 
             if (process.ExitCode != 0)
             {
diff --git a/source/Cosmos.Build.Builder/Models/Section.cs b/source/Cosmos.Build.Builder/Models/Section.cs
index e784be846..456f5d2cf 100644
--- a/source/Cosmos.Build.Builder/Models/Section.cs
+++ b/source/Cosmos.Build.Builder/Models/Section.cs
@@ -11,7 +11,7 @@ namespace Cosmos.Build.Builder.Models
         public string Log => _logBuilder.ToString();
         public bool HasLoggedErrors { get; private set; }
 
-        private StringBuilder _logBuilder;
+        private readonly StringBuilder _logBuilder;
 
         public Section(string name)
         {
diff --git a/source/Cosmos.Build.Builder/Services/DialogService.cs b/source/Cosmos.Build.Builder/Services/DialogService.cs
index 6353ffb60..6a845e6f8 100644
--- a/source/Cosmos.Build.Builder/Services/DialogService.cs
+++ b/source/Cosmos.Build.Builder/Services/DialogService.cs
@@ -5,8 +5,8 @@ namespace Cosmos.Build.Builder.Services
 {
     internal class DialogService<TView, TViewModel> : IDialogService<TViewModel> where TView : Window
     {
-        private Func<TView> _dialogFactory;
-        private Window _owner;
+        private readonly Func<TView> _dialogFactory;
+        private readonly Window _owner;
 
         public DialogService(Func<TView> dialogFactory, Window owner = null)
         {
diff --git a/source/Cosmos.Build.Builder/Services/VisualStudioService.cs b/source/Cosmos.Build.Builder/Services/VisualStudioService.cs
index 8b450aa9c..f480bec21 100644
--- a/source/Cosmos.Build.Builder/Services/VisualStudioService.cs
+++ b/source/Cosmos.Build.Builder/Services/VisualStudioService.cs
@@ -8,7 +8,7 @@ namespace Cosmos.Build.Builder.Services
 {
     internal class VisualStudioService : IVisualStudioService
     {
-        private Lazy<IReadOnlyList<ISetupInstance2>> _instances;
+        private readonly Lazy<IReadOnlyList<ISetupInstance2>> _instances;
 
         public VisualStudioService()
         {
diff --git a/source/Cosmos.Build.Builder/ViewModels/DependencyInstallationDialogViewModel.cs b/source/Cosmos.Build.Builder/ViewModels/DependencyInstallationDialogViewModel.cs
index b8377c5d4..8c63e41ed 100644
--- a/source/Cosmos.Build.Builder/ViewModels/DependencyInstallationDialogViewModel.cs
+++ b/source/Cosmos.Build.Builder/ViewModels/DependencyInstallationDialogViewModel.cs
@@ -6,7 +6,7 @@ using System.Windows.Input;
 
 namespace Cosmos.Build.Builder.ViewModels
 {
-    internal class DependencyInstallationDialogViewModel : ViewModelBase
+    internal sealed class DependencyInstallationDialogViewModel : ViewModelBase, IDisposable
     {
         private const string InstallationSucceededText = "{0} installed successfully!";
         private const string InstallationFailedText = "{0} failed to install!";
@@ -68,10 +68,16 @@ namespace Cosmos.Build.Builder.ViewModels
             OkCommand = new RelayCommand(p => Close(p as Window, true));
         }
 
+        public void Dispose()
+        {
+            _installTask.Dispose();
+            _installTaskCancellationTokenSource.Dispose();
+        }
+
         private void Install(object parameter) => _installTask = InstallAsync();
         private void CancelInstallation(object parameter) => _installTaskCancellationTokenSource.Cancel();
 
-        private void Close(Window window, bool? dialogResult)
+        private static void Close(Window window, bool? dialogResult)
         {
 #if DEBUG
             if (window == null)
diff --git a/source/Cosmos.Build.Builder/ViewModels/MainWindowLogger.cs b/source/Cosmos.Build.Builder/ViewModels/MainWindowLogger.cs
index a06c28480..6128130e7 100644
--- a/source/Cosmos.Build.Builder/ViewModels/MainWindowLogger.cs
+++ b/source/Cosmos.Build.Builder/ViewModels/MainWindowLogger.cs
@@ -9,7 +9,7 @@ namespace Cosmos.Build.Builder.ViewModels
     {
         private static readonly string[] NewLineStringArray = new string[] { Environment.NewLine };
 
-        private MainWindowViewModel _viewModel;
+        private readonly MainWindowViewModel _viewModel;
 
         public MainWindowLogger(MainWindowViewModel viewModel)
         {
diff --git a/source/Cosmos.Build.Builder/ViewModels/MainWindowViewModel.cs b/source/Cosmos.Build.Builder/ViewModels/MainWindowViewModel.cs
index 9c8d66222..05836967d 100644
--- a/source/Cosmos.Build.Builder/ViewModels/MainWindowViewModel.cs
+++ b/source/Cosmos.Build.Builder/ViewModels/MainWindowViewModel.cs
@@ -12,7 +12,7 @@ using Cosmos.Build.Builder.Services;
 
 namespace Cosmos.Build.Builder.ViewModels
 {
-    internal class MainWindowViewModel : ViewModelBase
+    internal sealed class MainWindowViewModel : ViewModelBase
     {
         private const int TailItemCount = 10;
 
@@ -35,12 +35,12 @@ namespace Cosmos.Build.Builder.ViewModels
             set => SetAndRaiseIfChanged(ref _windowState, value);
         }
 
-        private ILogger _logger;
+        private readonly ILogger _logger;
 
-        private IDialogService<DependencyInstallationDialogViewModel> _dependencyInstallationDialogService;
+        private readonly IDialogService<DependencyInstallationDialogViewModel> _dependencyInstallationDialogService;
 
-        private IBuildDefinition _buildDefinition;
-        private Task _buildTask;
+        private readonly IBuildDefinition _buildDefinition;
+        private readonly Task _buildTask;
 
         private bool _closeWhenCompleted;
 
@@ -109,12 +109,14 @@ namespace Cosmos.Build.Builder.ViewModels
                     {
                         _logger.LogMessage($"{dependency.Name} not found.");
 
-                        var viewModel = new DependencyInstallationDialogViewModel(dependency);
-                        _dependencyInstallationDialogService.ShowDialog(viewModel);
-
-                        if (!viewModel.InstallationSucceeded)
+                        using (var viewModel = new DependencyInstallationDialogViewModel(dependency))
                         {
-                            throw new Exception($"Dependency installation failed! Dependency name: {dependency.Name}");
+                            _dependencyInstallationDialogService.ShowDialog(viewModel);
+
+                            if (!viewModel.InstallationSucceeded)
+                            {
+                                throw new Exception($"Dependency installation failed! Dependency name: {dependency.Name}");
+                            }
                         }
                     }
                 }
diff --git a/source/Cosmos.Build.Builder/ViewModels/VisualStudioInstanceDialogViewModel.cs b/source/Cosmos.Build.Builder/ViewModels/VisualStudioInstanceDialogViewModel.cs
index 384639181..1b4a64d83 100644
--- a/source/Cosmos.Build.Builder/ViewModels/VisualStudioInstanceDialogViewModel.cs
+++ b/source/Cosmos.Build.Builder/ViewModels/VisualStudioInstanceDialogViewModel.cs
@@ -9,7 +9,7 @@ using Cosmos.Build.Builder.Services;
 
 namespace Cosmos.Build.Builder.ViewModels
 {
-    internal class VisualStudioInstanceDialogViewModel : ViewModelBase
+    internal sealed class VisualStudioInstanceDialogViewModel : ViewModelBase
     {
         public IEnumerable<VisualStudioInstance> VisualStudioInstances { get; }
 
@@ -22,7 +22,7 @@ namespace Cosmos.Build.Builder.ViewModels
         public ICommand OkCommand { get; }
         public ICommand CancelCommand { get; }
 
-        private IVisualStudioService _visualStudioService;
+        private readonly IVisualStudioService _visualStudioService;
 
         private VisualStudioInstance _selectedVisualStudioInstance;
 
@@ -37,7 +37,7 @@ namespace Cosmos.Build.Builder.ViewModels
             CancelCommand = new RelayCommand(p => Close(p as Window, false));
         }
 
-        private void Close(Window window, bool? dialogResult)
+        private static void Close(Window window, bool? dialogResult)
         {
 #if DEBUG
             if (window == null)