C#

public static void OrganiseSquares(ref List<Square> pio_Squares)

using System.Collections.Generic;

internal class Square
{
    private double m_Lenght;
    private double m_PositionX;
    private double m_PositionY;

    public Square(double p_Length)
    {
        m_Lenght = p_Length;
        m_PositionX = 0;
        m_PositionY = 0;        
    }

    public void SetPosition(double p_PositionX, double p_PositionY)
    {
        m_PositionX = p_PositionX;
        m_PositionY = p_PositionY;        
    }

    

    public double GetLenght()
    {

        return m_Lenght;

    }


   public static void OrganiseSquares(ref List<Square> pio_Squares)
   {
     // YOUR CODE HERE    
   }

}

<mmppf:MediaPlayer x:Name="YoutubePlayer" Visibility="Visible" IsFullScreenVisible="True"
IsFullScreenChanged="YoutubePlayer_IsFullScreenChanged"
Stretch="UniformToFill" MediaQuality="HighDefinition"
IsResolutionIndicatorVisible="True" IsSignalStrengthVisible="False" IsAudioSelectionVisible="True" IsPlayPauseVisible="True"
IsSkipAheadVisible="True" IsSkipBackVisible="True"
MediaOpened="YoutubePlayer_MediaOpened"
MediaEnded="YoutubePlayer_MediaEnded"
MediaQualityChanged="YoutubePlayer_MediaQualityChanged" ></mmppf:MediaPlayer>

private async void YoutubePlayer_IsFullScreenChanged(object sender, RoutedPropertyChangedEventArgs<bool> e)
    {
        try
        {

        }
        catch(Exception ex)
        {
            var dialog = new MessageDialog(ex.Message);
            dialog.ShowAsync();
        }

    }