Use HasBinding for Wpf/Uno in place of BindingOperations.GetBinding

src/Uno/Prism.Uno/Extensions/DependencyObjectExtensions.Uno.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Data;
+
+namespace Prism
+{
+    internal static partial class DependencyObjectExtensions
+    {
+        /// <summary>
+        /// Compatibility method to determine if the current thread can access a <see cref="DependencyObject"/>
+        /// </summary>
+        /// <param name="instance">The instance to check</param>
+        /// <returns><c>true</c> if the current thread has access to the instance, otherwise <c>false</c></returns>
+        public static bool CheckAccess(this DependencyObject instance)
+#if __WASM__
+            // This needs to evolve, once threading is supported
+            // See https://github.com/unoplatform/uno/issues/2302
+            => System.Threading.Thread.CurrentThread.ManagedThreadId == 1;
+#else
+            => instance.Dispatcher.HasThreadAccess;
+#endif
+    }
+}

src/Wpf/Prism.Wpf/Extensions/DependencyObjectExtensions.cs

@@ -12,20 +12,19 @@
 
 namespace Prism
 {
-    internal static class DependencyObjectExtensions
+    internal static partial class DependencyObjectExtensions
     {
-        public static bool CheckAccess(this DependencyObject instance)
-#if __WASM__
-            // This needs to evolve, once threading is supported
-            // See https://github.com/unoplatform/uno/issues/2302
-            => System.Threading.Thread.CurrentThread.ManagedThreadId == 1;
-#elif HAS_WINUI
-            => instance.Dispatcher.HasThreadAccess;
+        /// <summary>
+        /// Determines if a <see cref="DependencyProperty"/> has a binding set
+        /// </summary>
+        /// <param name="instance">The to use to search for the property</param>
+        /// <param name="property">The property to search</param>
+        /// <returns><c>true</c> if there is an active binding, otherwise <c>false</c></returns>
+        public static bool HasBinding(this FrameworkElement instance, DependencyProperty property)
+#if HAS_WINUI
+            => instance.GetBindingExpression(property) != null;
 #else
-            => instance.CheckAccess();
+            => BindingOperations.GetBinding(instance, property) != null;
 #endif
-
-        public static BindingExpression GetBinding(this FrameworkElement instance, DependencyProperty property)
-            => instance.GetBindingExpression(property);
     }
 }

src/Wpf/Prism.Wpf/Regions/Behaviors/SelectorItemsSourceSyncBehavior.cs

@@ -65,7 +65,7 @@ public DependencyObject HostControl
         protected override void OnAttach()
         {
             bool itemsSourceIsSet = this.hostControl.ItemsSource != null;
-            itemsSourceIsSet = itemsSourceIsSet || (this.hostControl.GetBinding(ItemsControl.ItemsSourceProperty) != null);
+            itemsSourceIsSet = itemsSourceIsSet || this.hostControl.HasBinding(ItemsControl.ItemsSourceProperty);
 
             if (itemsSourceIsSet)
             {

src/Wpf/Prism.Wpf/Regions/ContentControlRegionAdapter.cs

@@ -42,7 +42,7 @@ protected override void Adapt(IRegion region, ContentControl regionTarget)
                 throw new ArgumentNullException(nameof(regionTarget));
 
             bool contentIsSet = regionTarget.Content != null;
-            contentIsSet = contentIsSet || (regionTarget.GetBinding(ContentControl.ContentProperty) != null);
+            contentIsSet = contentIsSet || regionTarget.HasBinding(ContentControl.ContentProperty);
 
             if (contentIsSet)
                 throw new InvalidOperationException(Resources.ContentControlHasContentException);

src/Wpf/Prism.Wpf/Regions/ItemsControlRegionAdapter.cs

@@ -44,7 +44,7 @@ protected override void Adapt(IRegion region, ItemsControl regionTarget)
                 throw new ArgumentNullException(nameof(regionTarget));
 
             bool itemsSourceIsSet = regionTarget.ItemsSource != null;
-            itemsSourceIsSet = itemsSourceIsSet || (regionTarget.GetBinding(ItemsControl.ItemsSourceProperty) != null);
+            itemsSourceIsSet = itemsSourceIsSet || regionTarget.HasBinding(ItemsControl.ItemsSourceProperty);
 
             if (itemsSourceIsSet)
             {