Accessibility: NRE announcing changed item in PropertyGrid (#1998)

Accessibility: NRE announcing changed item in `PropertyGrid`
dotnet · Oct 24, 2019 · d890296 · d890296
2 parents 58d0d0d + 3dd3964
commit d890296
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/System.Windows.Forms/src/System/Windows/Forms/PropertyGrid.cs b/src/System.Windows.Forms/src/System/Windows/Forms/PropertyGrid.cs
@@ -3527,6 +3527,11 @@ internal void OnPropertyValueSet(GridItem changedItem, object oldValue)
         {
             OnPropertyValueChanged(new PropertyValueChangedEventArgs(changedItem, oldValue));
 
+            if (changedItem == null)
+            {
+                return;
+            }
+
             // Announce the property value change like standalone combobox control do: "[something] selected".
             bool dropDown = false;
             Type propertyType = changedItem.PropertyDescriptor.PropertyType;