CoreWindow.SizeChanged is not supported by the language

Question

I have red squigglies over the event and being told that CoreWindow.SizeChanged is not supported by the language. What do i do?

Answer 1

Hello, welcome to Microsoft Q&A,

CoreWindow.SizeChanged is not supported by the language

CoreWindow.SizeChanged is under Windows.UI.Core namespace that available in UWP platform. Please make sure your app is uwp app, and you need get CoreWindow with Window.Current.CoreWindow

public MainPage()  
{  
    this.InitializeComponent();  
    Window.Current.CoreWindow.SizeChanged += CoreWindow_SizeChanged;  
}  
  
private void CoreWindow_SizeChanged(Windows.UI.Core.CoreWindow sender, Windows.UI.Core.WindowSizeChangedEventArgs args)  
{  
     
}  

Thanks
Nico Zhu