The VideoLAN Forums

I work with with C# WPF and using this library https://github.com/ZeBobo5/Vlc.DotNet .
When i start resizing the app window, background of video(left and right black lines) starts flickering.

for vlc.dotnet the correct place to ask is https://github.com/ZeBobo5/Vlc.DotNet/issues
you could also try libvlcsharp.