From 8311b39ddc034f73ac11e2c7185067cbaebe00f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=98=E9=9F=AC=20=E5=BC=A0?= <hongtao_zhang@outlook.com>
Date: Thu, 21 Jan 2021 18:35:24 +0800
Subject: [PATCH] Add null check for OnCollectionChanged

---
 Flow.Launcher/ViewModel/ResultsViewModel.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Flow.Launcher/ViewModel/ResultsViewModel.cs b/Flow.Launcher/ViewModel/ResultsViewModel.cs
index 55dea7440..2a0818b7d 100644
--- a/Flow.Launcher/ViewModel/ResultsViewModel.cs
+++ b/Flow.Launcher/ViewModel/ResultsViewModel.cs
@@ -249,7 +249,7 @@ namespace Flow.Launcher.ViewModel
 
             protected void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
             {
-                CollectionChanged(this, e);
+                CollectionChanged?.Invoke(this, e);
             }
 
             public void BulkAddAll(List<ResultViewModel> resultViews)