Change the initialization time of Radio button's isChecked

src/Calculator/Views/CalculatorProgrammerRadixOperators.xaml

@@ -346,13 +346,13 @@
                     <Flyout x:Name="BitShiftFlyout"
                             Windows10version1809:AreOpenCloseAnimationsEnabled="False"
                             FlyoutPresenterStyle="{ThemeResource OperatorPanelFlyoutStyle}"
-                            Placement="Bottom">
+                            Placement="Bottom"
+                            Opened="BitShiftFlyout_Opened">
                         <StackPanel MaxWidth="192" Padding="12">
                             <RadioButton x:Name="ArithmeticShiftButton"
                                          x:Uid="arithmeticShiftButton"
                                          AutomationProperties.AutomationId="arithmeticShiftButton"
-                                         Checked="BitshiftFlyout_Checked"
+                                         Checked="BitshiftFlyout_Checked"/>
-                                         IsChecked="True"/>
                             <RadioButton x:Name="LogicalShiftButton"
                                          x:Uid="logicalShiftButton"
                                          AutomationProperties.AutomationId="logicalShiftButton"

src/Calculator/Views/CalculatorProgrammerRadixOperators.xaml.cpp

@@ -38,6 +38,7 @@ void CalculatorProgrammerRadixOperators::LoadResourceStrings()
     m_logicalShiftButtonContent = resProvider->GetResourceString(L"logicalShiftButtonSelected");
     m_rotateCircularButtonContent = resProvider->GetResourceString(L"rotateCircularButtonSelected");
     m_rotateCarryShiftButtonContent = resProvider->GetResourceString(L"rotateCarryShiftButtonSelected");
+    m_selectedShiftButtonContent = m_arithmeticShiftButtonContent;
 }
 
 void CalculatorProgrammerRadixOperators::FlyoutButton_Clicked(_In_ Platform::Object ^ /*sender*/, _In_ Windows::UI::Xaml::RoutedEventArgs ^ /*e*/)
@@ -45,11 +46,6 @@ void CalculatorProgrammerRadixOperators::FlyoutButton_Clicked(_In_ Platform::Obj
     this->BitwiseFlyout->Hide();
 }
 
-void CalculatorProgrammerRadixOperators::checkDefaultBitShift()
-{
-    this->ArithmeticShiftButton->IsChecked = true;
-}
-
 void CalculatorProgrammerRadixOperators::BitshiftFlyout_Checked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e)
 {
     // Load deferred load buttons
@@ -109,7 +105,12 @@ void CalculatorProgrammerRadixOperators::BitshiftFlyout_Checked(Platform::Object
         announcementString = m_rotateCarryShiftButtonContent;
     }
 
-    this->BitShiftFlyout->Hide();
+    if (announcementString != m_selectedShiftButtonContent)
+    {
+        this->BitShiftFlyout->Hide();
+        m_selectedShiftButtonContent = announcementString;
+    }
+
     Model->SetBitshiftRadioButtonCheckedAnnouncement(announcementString);
 }
 
@@ -176,3 +177,23 @@ void CalculatorProgrammerRadixOperators::ClearButton_LostFocus(Object ^ sender,
         ClearEntryButton->Focus(::FocusState::Programmatic);
     }
 }
+
+void CalculatorApp::CalculatorProgrammerRadixOperators::BitShiftFlyout_Opened(Platform::Object ^ sender, Platform::Object ^ e)
+{
+    if (m_selectedShiftButtonContent == m_arithmeticShiftButtonContent)
+    {
+        ArithmeticShiftButton->IsChecked = true;
+    }
+    else if (m_selectedShiftButtonContent == m_logicalShiftButtonContent)
+    {
+        LogicalShiftButton->IsChecked = true;
+    }
+    else if (m_selectedShiftButtonContent == m_rotateCircularButtonContent)
+    {
+        RotateCircularButton->IsChecked = true;
+    }
+    else if (m_selectedShiftButtonContent == m_rotateCarryShiftButtonContent)
+    {
+        RotateCarryShiftButton->IsChecked = true;
+    }
+}

src/Calculator/Views/CalculatorProgrammerRadixOperators.xaml.h

@@ -30,8 +30,6 @@ namespace CalculatorApp
 
         DEPENDENCY_PROPERTY_OWNER(CalculatorProgrammerRadixOperators);
 
-        void checkDefaultBitShift();
-
     private:
         void BitshiftFlyout_Checked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
         void FlyoutButton_Clicked(_In_ Platform::Object ^ sender, _In_ Windows::UI::Xaml::RoutedEventArgs ^ e);
@@ -42,6 +40,8 @@ namespace CalculatorApp
         void OpenParenthesisButton_GotFocus(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
         void ClearEntryButton_LostFocus(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
         void ClearButton_LostFocus(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+        void BitShiftFlyout_Opened(Platform::Object ^ sender, Platform::Object ^ e);
+        Platform::String ^ m_selectedShiftButtonContent;
         Platform::String ^ m_arithmeticShiftButtonContent;
         Platform::String ^ m_logicalShiftButtonContent;
         Platform::String ^ m_rotateCircularButtonContent;

src/Calculator/Views/OperatorsPanel.xaml.cpp

@@ -71,11 +71,6 @@ void OperatorsPanel::EnsureProgrammerRadixOps()
     {
         this->FindName(L"ProgrammerRadixOperators");
     }
-
-    if (ProgrammerRadixOperators)
-    {
-        ProgrammerRadixOperators->checkDefaultBitShift();
-    }
 }
 
 void OperatorsPanel::EnsureProgrammerBitFlipPanel()