Fix WrapPanel stretching behavior for last item

components/Primitives/src/WrapPanel/WrapPanel.cs

@@ -219,7 +219,8 @@ void Arrange(UIElement child, bool isLast = false)
             }
 
             // Stretch the last item to fill the available space
-            if (isLast)
+            // if the parent measure is not infinite
+            if (isLast && double.IsInfinity(parentMeasure.U) is false)
             {
                 desiredMeasure.U = parentMeasure.U - position.U;
             }