From b6bd42268518fa07bb0729921e1046fe0ea78c3b Mon Sep 17 00:00:00 2001
From: Tian L <60599517+tian-lt@users.noreply.github.com>
Date: Tue, 25 May 2021 11:41:25 +0800
Subject: [PATCH] fixes up a bug (#35)

---
 src/Calculator/Views/MainPage.xaml.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Calculator/Views/MainPage.xaml.cs b/src/Calculator/Views/MainPage.xaml.cs
index 182896bc..b3cfebda 100644
--- a/src/Calculator/Views/MainPage.xaml.cs
+++ b/src/Calculator/Views/MainPage.xaml.cs
@@ -552,7 +552,7 @@ namespace CalculatorApp
 
         private void ShowAboutPage()
         {
-            if (AboutPage != null)
+            if (AboutPage == null)
             {
                 FindName("AboutPage");
             }