Some another warnings eliminated.

src/Microsoft.VisualStudio.SlowCheetah.VS.Tests/Microsoft.VisualStudio.SlowCheetah.VS.Tests.csproj

@@ -6,8 +6,10 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.ServiceHub.Framework" Version="3.1.4097" />
     <PackageReference Include="Microsoft.VisualStudio.Internal.MicroBuild.NonShipping" Version="2.0.66" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" />
+    <PackageReference Include="Microsoft.VisualStudio.TemplateWizardInterface" Version="17.2.32505.113" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="1.6.30" />

src/Microsoft.VisualStudio.SlowCheetah.VS/Microsoft.VisualStudio.SlowCheetah.VS.csproj

@@ -10,8 +10,11 @@
 
   <ItemGroup>
     <PackageReference Include="EnvDTE" Version="17.2.32505.113" />
+    <PackageReference Include="Microsoft.ServiceHub.Framework" Version="3.1.4097" />
 
     <PackageReference Include="Microsoft.VisualStudio.Internal.MicroBuild.VisualStudio" Version="2.0.66" />
+
+    <PackageReference Include="Microsoft.VisualStudio.TemplateWizardInterface" Version="17.2.32505.113" />
     <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.2.2186">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/BackgroundInstallationHandler.cs

@@ -35,7 +35,7 @@ public BackgroundInstallationHandler(IPackageHandler successor)
         public bool IsUpdate { get; set; } = false;
 
         /// <inheritdoc/>
-        public override async TPL.Task Execute(Project project)
+        public override async TPL.Task ExecuteAsync(Project project)
         {
             await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
             string projName = project.UniqueName;
@@ -62,7 +62,7 @@ public override async TPL.Task Execute(Project project)
                         string outputMessage = Resources.Resources.NugetInstall_FinishedOutput;
                         try
                         {
-                            await this.Successor.Execute(project);
+                            await this.Successor.ExecuteAsync(project);
                         }
                         catch
                         {

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/BasePackageHandler.cs

@@ -39,6 +39,6 @@ protected BasePackageHandler(IPackageHandler successor)
         protected IPackageHandler Successor { get; }
 
         /// <inheritdoc/>
-        public abstract TPL.Task Execute(Project project);
+        public abstract TPL.Task ExecuteAsync(Project project);
     }
 }

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/DialogInstallationHandler.cs

@@ -4,6 +4,7 @@
 namespace Microsoft.VisualStudio.SlowCheetah.VS
 {
     using EnvDTE;
+    using Microsoft.VisualStudio.Shell;
     using Microsoft.VisualStudio.Shell.Interop;
     using TPL = System.Threading.Tasks;
 
@@ -22,8 +23,9 @@ public DialogInstallationHandler(IPackageHandler successor)
         }
 
         /// <inheritdoc/>
-        public override async TPL.Task Execute(Project project)
+        public override async TPL.Task ExecuteAsync(Project project)
         {
+            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
             if (await this.HasUserAcceptedWarningMessageAsync(Resources.Resources.NugetUpdate_Title, Resources.Resources.NugetUpdate_Text))
             {
                 // Creates dialog informing the user to wait for the installation to finish
@@ -37,7 +39,7 @@ public override async TPL.Task Execute(Project project)
 
                 try
                 {
-                    await this.Successor.Execute(project);
+                    await this.Successor.ExecuteAsync(project);
                 }
                 finally
                 {

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/EmptyHandler.cs

@@ -26,7 +26,7 @@ public EmptyHandler(AsyncPackage package)
         public AsyncPackage Package { get; }
 
         /// <inheritdoc/>
-        public TPL.Task Execute(Project project)
+        public TPL.Task ExecuteAsync(Project project)
         {
             // Do nothing
             return TPL.Task.CompletedTask;

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/IPackageHandler.cs

@@ -22,6 +22,6 @@ internal interface IPackageHandler
         /// </summary>
         /// <param name="project">The project to peform actions on</param>
         /// <returns>A task that executes the function</returns>
-        TPL.Task Execute(Project project);
+        TPL.Task ExecuteAsync(Project project);
     }
 }

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/NuGetUninstaller.cs

@@ -25,14 +25,14 @@ public NuGetUninstaller(IPackageHandler successor)
         }
 
         /// <inheritdoc/>
-        public override async TPL.Task Execute(Project project)
+        public override async TPL.Task ExecuteAsync(Project project)
         {
             var componentModel = (IComponentModel)await this.Package.GetServiceAsync(typeof(SComponentModel));
             Assumes.Present(componentModel);
             IVsPackageUninstaller packageUninstaller = componentModel.GetService<IVsPackageUninstaller>();
             packageUninstaller.UninstallPackage(project, SlowCheetahNuGetManager.OldPackageName, true);
 
-            await this.Successor.Execute(project);
+            await this.Successor.ExecuteAsync(project);
         }
     }
 }

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/NugetInstaller.cs

@@ -4,6 +4,7 @@
 namespace Microsoft.VisualStudio.SlowCheetah.VS
 {
     using EnvDTE;
+    using Microsoft;
     using Microsoft.VisualStudio.ComponentModelHost;
     using NuGet.VisualStudio;
     using TPL = System.Threading.Tasks;
@@ -23,9 +24,10 @@ public NugetInstaller(IPackageHandler successor)
         }
 
         /// <inheritdoc/>
-        public override async TPL.Task Execute(Project project)
+        public override async TPL.Task ExecuteAsync(Project project)
         {
             var componentModel = (IComponentModel)await this.Package.GetServiceAsync(typeof(SComponentModel));
+            Assumes.Present(componentModel);
             IVsPackageInstaller packageInstaller = componentModel.GetService<IVsPackageInstaller>();
             packageInstaller.InstallPackage(
                 null,
@@ -34,7 +36,7 @@ public override async TPL.Task Execute(Project project)
                 version: (string)null, // install latest stable version
                 ignoreDependencies: false);
 
-            await this.Successor.Execute(project);
+            await this.Successor.ExecuteAsync(project);
         }
     }
 }

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/TargetsUninstaller.cs

@@ -24,10 +24,10 @@ public TargetsUninstaller(IPackageHandler successor)
         }
 
         /// <inheritdoc/>
-        public override async TPL.Task Execute(Project project)
+        public override async TPL.Task ExecuteAsync(Project project)
         {
             // We handle any NuGet package logic before editing the project file
-            await this.Successor.Execute(project);
+            await this.Successor.ExecuteAsync(project);
             await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
 
             project.Save();

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/PackageHandlers/UserInstallationHandler.cs

@@ -6,6 +6,7 @@ namespace Microsoft.VisualStudio.SlowCheetah.VS
     using System;
     using System.Threading.Tasks;
     using Microsoft.VisualStudio;
+    using Microsoft.VisualStudio.Shell;
     using Microsoft.VisualStudio.Shell.Interop;
 
     /// <summary>
@@ -30,6 +31,7 @@ public UserInstallationHandler(IPackageHandler successor)
         /// <returns>True if the user has accepted the warning message</returns>
         protected async Task<bool> HasUserAcceptedWarningMessageAsync(string title, string message)
         {
+            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
             var shell = (IVsUIShell)await this.Package.GetServiceAsync(typeof(SVsUIShell));
 
             if (shell != null)

src/Microsoft.VisualStudio.SlowCheetah.VS/NugetHandler/SlowCheetahNuGetManager.cs

@@ -168,7 +168,7 @@ public async TPL.Task CheckSlowCheetahInstallationAsync(IVsHierarchy hierarchy)
                 };
             }
 
-            await plan.Execute(currentProject);
+            await plan.ExecuteAsync(currentProject);
         }
 
         private static IVsPackageInstallerServices GetInstallerServices(IServiceProvider package)

src/Microsoft.VisualStudio.SlowCheetah.VS/Package/AddTransformCommand.cs

@@ -52,6 +52,7 @@ protected override void OnChange(object sender, EventArgs e)
         protected override void OnBeforeQueryStatus(object sender, EventArgs e)
         {
             ThreadHelper.ThrowIfNotOnUIThread();
+
             // get the menu that fired the event
             if (sender is OleMenuCommand menuCommand)
             {

src/Microsoft.VisualStudio.SlowCheetah.VS/TransformationPreviewLogger.cs

@@ -12,7 +12,7 @@ namespace Microsoft.VisualStudio.SlowCheetah.VS
     using System.Globalization;
     using Microsoft.VisualStudio.Shell;
     using Microsoft.VisualStudio.Shell.Interop;
-    using SlowCheetah;
+    using Microsoft.VisualStudio.SlowCheetah;
 
     /// <summary>
     /// Logger for XDT transformation on Preview Transform

src/Microsoft.VisualStudio.SlowCheetah.VS/Utilities/ProjectUtilities.cs

@@ -33,6 +33,7 @@ public static class ProjectUtilities
         /// <returns>The Visual Studio DTE object</returns>
         public static DTE GetDTE()
         {
+            ThreadHelper.ThrowIfNotOnUIThread();
             return (DTE)Package.GetGlobalService(typeof(DTE));
         }
 
@@ -119,6 +120,7 @@ public static bool IsSingleProjectItemSelection(out IVsHierarchy hierarchy, out
         /// <returns>List of configuration names for that project</returns>
         public static IEnumerable<string> GetProjectConfigurations(Project project)
         {
+            ThreadHelper.ThrowIfNotOnUIThread();
             List<string> configurations = new List<string>();
 
             if (project != null && project.ConfigurationManager != null && project.ConfigurationManager.ConfigurationRowNames != null)
@@ -185,6 +187,7 @@ public static IEnumerable<string> GetSupportedItemExtensions(IVsSettingsManager
         /// <returns>True if a subtype GUID matches the Web App Guid in Resources</returns>
         public static bool IsProjectWebApp(IVsProject project)
         {
+            ThreadHelper.ThrowIfNotOnUIThread();
             if (project is IVsAggregatableProject aggregatableProject)
             {
                 aggregatableProject.GetAggregateProjectTypeGuids(out string projectTypeGuidStrings);

src/SlowCheetah.sln

@@ -9,6 +9,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.VisualStudio.Slow
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{16014DDD-6525-48EF-9D6A-E1067594E1E8}"
 	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
 		stylecop.json = stylecop.json
 		..\version.json = ..\version.json
 	EndProjectSection