Add test for new preview warning

Author: Sergio0694

test/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildAWindowsDesktopProject.cs

@@ -478,6 +478,26 @@ public void ItDoesNotWarnAnymoreWhenBuildingAProjectWithUseUwpProperty()
                 .NotHaveStdOutContaining("NETSDK1219");
         }
 
+        [WindowsOnlyFact]
+        public void ItWarnsWhenBuildingAProjectTargetingCsWinRT3_0()
+        {
+            TestProject testProject = new()
+            {
+                Name = "A",
+                ProjectSdk = "Microsoft.NET.Sdk",
+                TargetFrameworks = "net10.0-windows10.0.22621.1"
+            };
+
+            var testAsset = _testAssetsManager.CreateTestProject(testProject);
+
+            var buildCommand = new BuildCommand(testAsset);
+            buildCommand.Execute()
+                .Should()
+                .Pass()
+                .And
+                .NotHaveStdOutContaining("NETSDK1229");
+        }
+
         [WindowsOnlyFact]
         public void ItErrorsWhenTargetingBelowNet6WithUseUwpProperty()
         {