CCT.NUI.WPFSamples.VideoManipulationWindow.CheckVideos C# (CSharp) Method

        private void CheckVideos()
        {
            if (this.videoPaths.Count() == 0 || this.videoPaths.Any(path => !File.Exists(path)))
            {
                MessageBox.Show("There's a problem with your video file paths");
                this.Close();
            }
        }