Does VLC media player have a C# interface?

There is

• a .NET Interface to VLC which is

  a .Net user control that uses libvlc interfaces

• Vlc.DotNet which is

  a .net library that hosts the audio/video capabilities of the VLC libraries. In other words, it's a .net wrapper around libvlc.

• an implementation on CodePlex - DMediaPlayer - Simple VLC frontend. which is

  a simple but nice frontend for VLC media player.

Also there is Vlc.DotNet

The project have all you need and it is compatible all versions of VLC >= 1.1

You can find samples on site.