Update tests for .NET 6

test/EndToEnd/GivenWindowsApp.cs

@@ -0,0 +1,45 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.IO;
+using System.Xml.Linq;
+using FluentAssertions;
+using Microsoft.DotNet.TestFramework;
+using Microsoft.DotNet.Tools.Test.Utilities;
+using Xunit;
+
+namespace EndToEnd
+{
+    public class GivenWindowsApp : TestBase
+    {
+        [WindowsOnlyTheory]
+        [InlineData("10.0.17763.0")]
+        [InlineData("10.0.18362.0")]
+        [InlineData("10.0.19041.0")]
+        public void ItCanBuildAndRun(string targetPlatformVersion)
+        {
+            var testInstance = TestAssets.Get(TestAssetKinds.TestProjects, "UseCswinrt")
+                .CreateInstance("UseCswinrt" + targetPlatformVersion)
+                .WithSourceFiles();
+
+            var projectPath = Path.Combine(testInstance.Root.FullName, "consolecswinrt.csproj");
+            var project = XDocument.Load(projectPath);
+            var ns = project.Root.Name.Namespace;
+
+            //  Update TargetFramework to the right version of .NET Core
+            project.Root.Element(ns + "PropertyGroup")
+                .Add(new XElement(ns + "TargetPlatformVersion", targetPlatformVersion));
+
+            project.Save(projectPath);
+
+            new BuildCommand()
+                    .WithProjectFile(new FileInfo(testInstance.Root.FullName))
+                    .Execute()
+                    .Should().Pass();
+
+            new RunCommand().WithWorkingDirectory(testInstance.Root.FullName)
+                    .Execute("--no-build")
+                    .Should().Pass().And.HaveStdOutContaining("Hello");
+        }
+    }
+}