Fixed runtime binding exception in wasdk gallery where the generated options pane is used.

Author: Arlodotexe

CommunityToolkit.App.Shared/Renderers/GeneratedSampleOptionsRenderer.xaml.cs

@@ -30,14 +30,14 @@ public GeneratedSampleOptionsRenderer()
     /// The backing <see cref="DependencyProperty"/> for <see cref="SampleOptions"/>.
     /// </summary>
     public static readonly DependencyProperty SampleOptionsProperty =
-        DependencyProperty.Register(nameof(SampleOptions), typeof(IEnumerable<IGeneratedToolkitSampleOptionViewModel>), typeof(GeneratedSampleOptionsRenderer), new PropertyMetadata(null));
+        DependencyProperty.Register(nameof(SampleOptions), typeof(List<IGeneratedToolkitSampleOptionViewModel>), typeof(GeneratedSampleOptionsRenderer), new PropertyMetadata(new List<IGeneratedToolkitSampleOptionViewModel>()));
 
     /// <summary>
     /// The generated sample options that should be displayed to the user.
     /// </summary>
-    public IEnumerable<IGeneratedToolkitSampleOptionViewModel>? SampleOptions
+    public List<IGeneratedToolkitSampleOptionViewModel> SampleOptions
     {
-        get => (IEnumerable<IGeneratedToolkitSampleOptionViewModel>?)GetValue(SampleOptionsProperty);
+        get => (List<IGeneratedToolkitSampleOptionViewModel>)GetValue(SampleOptionsProperty);
         set => SetValue(SampleOptionsProperty, value);
     }
 

CommunityToolkit.App.Shared/Renderers/ToolkitSampleRenderer.xaml.cs

@@ -193,10 +193,13 @@ private async Task LoadData()
             // Generated properties reference these in getters and setters.
             propertyContainer.GeneratedPropertyMetadata = Metadata.GeneratedSampleOptions;
 
-            SampleOptionsPaneInstance = new GeneratedSampleOptionsRenderer
+            if (propertyContainer.GeneratedPropertyMetadata is not null)
             {
-                SampleOptions = propertyContainer.GeneratedPropertyMetadata
-            };
+                SampleOptionsPaneInstance = new GeneratedSampleOptionsRenderer
+                {
+                    SampleOptions = propertyContainer.GeneratedPropertyMetadata.ToList()
+                };
+            }
         }
         else
         {