Inline temporary variable messes up event registration for nested method

[shyamnamboodiripad]

Version Used: 16.0.0 Int Preview [28320.52.d16.0]

Steps to Reproduce:

[TestClass]
class SettingsTests
{
    [TestMethod]
    public void Notifications()
    {
        var service = MockSettingsService.Instance;
        var notifications = new Queue<SettingChangedEventArgs>();
        void OnSettingChanged(object sender, SettingChangedEventArgs e) => notifications.Enqueue(e);
        service.SettingChanged += OnSettingChanged;
    }
}

2. Trigger Inline temporary variable refactoring for local service

Expected Behavior:

var notifications = new Queue<SettingChangedEventArgs>();
void OnSettingChanged(object sender, SettingChangedEventArgs e) => notifications.Enqueue(e);
MockSettingsService.Instance.SettingChanged += OnSettingChanged;

Actual Behavior:

var notifications = new Queue<SettingChangedEventArgs>();
void OnSettingChanged(object sender, SettingChangedEventArgs e) => notifications.Enqueue(e);
MockSettingsService.Instance.SettingChanged += SettingsTests.OnSettingChanged;

[CyrusNajmabadi]

Looks like a complexification/simplification issue.