Examples of errors detected by the V3084 diagnostic

V3084. Anonymous function is used to unsubscribe from event. No handlers will be unsubscribed, as a separate delegate instance is created for each anonymous function declaration.

PixiEditor

V3084 Anonymous function is used to unsubscribe from 'OnLanguageChanged' event. No handlers will be unsubscribed, as a separate delegate instance is created for each anonymous function declaration. Translator.cs 78

private static void UseLanguageFlowDirectionPropertyChanged(....)
{
  ....

  if (!obj.NewValue.Value)
  {
    obj.Sender.SetValue(Control.FlowDirectionProperty,
                        FlowDirection.LeftToRight);
    ILocalizationProvider.Current.OnLanguageChanged -=
    (lang) => OnLanguageChangedFlowDirection(obj.Sender);
  }
  else
  {
    OnLanguageChangedFlowDirection(obj.Sender);
    ILocalizationProvider.Current.OnLanguageChanged +=
    (lang) => OnLanguageChangedFlowDirection(obj.Sender);
  }
}

MSBuild

V3084 Anonymous function is used to unsubscribe from 'OnImmutablePathsInitialized' event. No handlers will be unsubscribed, as a separate delegate instance is created for each anonymous function declaration. CheckScopeClassifier.cs 67

private static void SubscribeImmutablePathsInitialized()
{
  NotifyOnScopingReadiness?.Invoke();

  FileClassifier.Shared.OnImmutablePathsInitialized -= () =>
    NotifyOnScopingReadiness?.Invoke();
}