MainWindow.xaml

<Window x:Class="DBMPlayer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:DBMPlayer"
        mc:Ignorable="d"
        Title="Cefam" Height="450" Width="800">
    <Grid>
        <Button Content="&lt;" HorizontalAlignment="Left" Margin="10,355,0,0" VerticalAlignment="Top" Width="126" Height="55" Click="Button_Click_Previous"/>
        <Button Content="&gt;" HorizontalAlignment="Left" Margin="658,355,0,0" VerticalAlignment="Top" Width="126" Height="55" Click="Button_Click_Next"/>
        <Button Content="||" HorizontalAlignment="Left" Margin="340,355,0,0" VerticalAlignment="Top" Width="126" Height="55" Click="Button_Click_Pause"/>

    </Grid>
</Window>