xamarin Essentials: No overload for > 'OnMainDisplayInfoChanged' matches delegate > 'EventHandler'

Question

I am following a Xamarin Example with my code:

    public App()
    {
        InitializeComponent();
        DeviceDisplay.MainDisplayInfoChanged += OnMainDisplayInfoChanged;
    }

    void OnMainDisplayInfoChanged(DisplayInfoChangedEventArgs e)
    {
        var displayInfo = e.DisplayInfo;
    }

As far as I can see this is just the same as in this example:

https://learn.microsoft.com/en-us/xamarin/essentials/device-display?context=xamarin%2Fios&tabs=uwp

But it is giving me the error message:

App.xaml.cs(13,13): Error CS0123: No overload for 'OnMainDisplayInfoChanged' matches delegate 'EventHandler' (CS0123)

Can anyone help explain to me what this error message means and let me know if there is a way for me to fix this?

R15 · Accepted Answer · 2019-02-11T08:48:27.230

3

This error is coming because you missing first param that is object sender. Try to pass full method signature.

private void OnMainDisplayInfoChanged(object sender, DisplayInfoChangedEventArgs e)
{
   var displayInfo = e.DisplayInfo;
}

edited Feb 11 '19 at 08:48

answered Feb 11 '19 at 08:33

R15

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thanks, looks like the xamarin documentation also has that error. – Alan2 Feb 11 '19 at 08:50

xamarin Essentials: No overload for > 'OnMainDisplayInfoChanged' matches delegate > 'EventHandler'

1 Answers1