KeyNotFoundException & ArgumentNullException

I am using code sample found here: https://github.com/Redth/ZXing.Net.Mobile/blob/master/Samples/Forms/Core/HomePage.cs

MainActivity.cs `

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;
        base.OnCreate(bundle);
        ZXing.Net.Mobile.Forms.Android.Platform.Init();
        global::Xamarin.Forms.Forms.Init(this, bundle);
        LoadApplication(new App());
    }
    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
    {
        global::ZXing.Net.Mobile.Android.PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

`

Home.xaml.cs `

public partial class Home : ContentPage
{
    	ZXingScannerPage scanPage;
    	Button buttonScanDefaultOverlay;
    	public Home() : base()
    	{
        		buttonScanDefaultOverlay = new Button
        		{
           			 Text = "Scan with Default Overlay",
            		AutomationId = "scanWithDefaultOverlay",
      		  };
       		 buttonScanDefaultOverlay.Clicked += async delegate {
           		 scanPage = new ZXingScannerPage();
            	 scanPage.OnScanResult += (result) => {
                		 scanPage.IsScanning = false;
                		Device.BeginInvokeOnMainThread(() => {
                     	Navigation.PopAsync();
                     	DisplayAlert("Scanned Barcode", result.Text, "OK");
                		 });
           		 };
            	await Navigation.PushAsync(scanPage);
       	 };
       	 var stack = new StackLayout();
        	 stack.Children.Add(buttonScanDefaultOverlay);
        	 Content = stack;
   		 }
}

`

AndroidManifest.xml

<uses-permission android:name=“android.permission.CAMERA” /> <uses-feature android:name=“android.hardware.camera” /> <uses-feature android:name=“android.hardware.camera.autofocus” /> <uses-permission android:name=“android.permission.FLASHLIGHT” />

AssemblyInfo.cs

[assembly: UsesPermission(Android.Manifest.Permission.Flashlight)]

Upon pressing the button I get thrown the following exceptions:

• Exception of type ‘System.Collections.Generic.KeyNotFoundException’ was thrown. (KeyNotFoundException)
• Value cannot be null. Parameter name: property (ArgumentNullException)

Where am I supposed to handle them?

[MrJerB]

Yep, don’t bother using Live Player.

[maatj05]

When I attach my physical device to my PC with a USB cable , instead of using ‘Xamarin Live’, then the error does not occur… So in my opinion: problem solved