Windows error 0xC00D11B1, -1072885327

Play file from network drive with # in path using MediaElement

Repro code: <Window x:Class="MediaBox.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MediaBox" Title="MainWindow"> <Grid> <Grid.RowDefinitions> <RowDefinition /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <MediaElement LoadedBehavior="Play" MediaFailed="OnMediaFailed" Source="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainWindow}}, Path=FileName}" /> <Button Grid.Row="1" Click="OnOpenClick" Content="Open" /> </Grid> </Window> public partial class MainWindow : Window { public static readonly DependencyProperty FileNameProperty = DependencyProperty.Register( nameof(FileName), typeof(string), typeof(MainWindow), [...] read more