Merge pull request #994 from unoplatform/dev/xygu/20240111/rrt-build-…

…error

chore: fix uwp build error

src/Uno.Toolkit.RuntimeTests/Tests/ResponsiveExtensionsTests.cs

@@ -1,4 +1,5 @@
-using System;
+#if HAS_UNO || !IS_UWP
+using System;
 using System.ComponentModel;
 using System.Threading.Tasks;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
@@ -24,6 +25,8 @@ namespace Uno.Toolkit.RuntimeTests.Tests;
 [Ignore("blocked by #14620: dynamically loaded MarkupExtension are not initialized.")] // https://github.com/unoplatform/uno/issues/14620
 #elif IS_UWP
 [Ignore("ResponsiveExtension is not supported on UWP.")]
+#else
+// just to be clear, the tests is currently only running on WINUI_DESKTOP
 #endif
 [RunsOnUIThread]
 internal class ResponsiveExtensionsTests
@@ -158,3 +161,4 @@ public async Task ProvideValue_Orientation_SizeChange()
 		Assert.AreEqual(Orientation.Horizontal, sut.Orientation);
 	}
 }
+#endif