new folder structure and new C# script host

src/WPF/AboutWindow.xaml

@@ -0,0 +1,24 @@
+<Window x:Class="mpvnet.AboutWindow"
+        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:mpvnet="clr-namespace:mpvnet"
+        mc:Ignorable="d"
+        
+        Title="About mpv.net"
+        FontSize="16"
+        ShowInTaskbar="False"
+        WindowStartupLocation="CenterOwner"
+        ResizeMode="NoResize"
+        SizeToContent="WidthAndHeight"
+        Foreground="{x:Static mpvnet:Theme.Foreground}"
+        Background="{x:Static mpvnet:Theme.Background}">
+    
+    <Grid>
+        <StackPanel HorizontalAlignment="Center">
+            <TextBlock FontSize="30" TextAlignment="Center"  Margin="10,10,10,0">mpv.net</TextBlock>
+            <TextBlock Name="ContentBlock" TextAlignment="Center" Margin="20,10,20,20"></TextBlock>
+        </StackPanel>
+    </Grid>
+</Window>