Unexpected Null Reference handling in WPF Application During Data Binding
Does anyone know how to I'm stuck on something that should probably be simple. I'm stuck trying to I tried several approaches but none seem to work. I'm working on a personal project and I'm working with a `NullReferenceException` in my WPF application when trying to bind data to a `ListView`. The behavior occurs intermittently when the view is loaded, and I'm not able to pinpoint the exact cause. My data context is set correctly, and I have verified that the data source is populated before binding. Here’s the relevant part of my code for setting up the data context: ```csharp public partial class MainWindow : Window { public ObservableCollection<MyData> Items { get; set; } public MainWindow() { InitializeComponent(); Items = new ObservableCollection<MyData>(); DataContext = this; LoadData(); } private void LoadData() { // Simulate data loading Items.Add(new MyData { Name = "Item1" }); Items.Add(new MyData { Name = "Item2" }); } } ``` In my XAML, I have the following binding: ```xml <ListView ItemsSource="{Binding Items}"> <ListView.View> <GridView> <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" /> </GridView> </ListView.View> </ListView> ``` The `Items` collection is properly updated, and I can see the items in the `ListView` after loading. However, occasionally, I receive the behavior: ``` System.NullReferenceException: Object reference not set to an instance of an object. ``` I’ve checked that my `MyData` class has a `Name` property that is never null, and AFAIK, the data context is set before the UI is rendered. To debug, I added some logging in the `LoadData` method to confirm the data is loaded properly before the view is displayed, which it is. I'm using .NET Core 3.1 and WPF, and this scenario seems to be stemming from either the data binding or the timing of the UI rendering. Has anyone experienced a similar scenario, or could there be an edge case I’m missing with WPF data binding? I'm coming from a different tech stack and learning C#. Could someone point me to the right documentation? For reference, this is a production mobile app. I appreciate any insights! This is happening in both development and production on CentOS. I'm coming from a different tech stack and learning C#. I'd really appreciate any guidance on this.