App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:sys="clr-namespace:System;assembly=netstandard"
             xmlns:uabea="clr-namespace:UABEAvalonia"
             x:Class="UABEAvalonia.App">
	<Application.Styles>
	<SimpleTheme/>
	<StyleInclude Source="avares://Avalonia.Themes.Simple/Controls/SimpleControls.xaml"/>
	<StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Simple.xaml"/>
  <StyleInclude Source="avares://AvaloniaEdit/Themes/Simple/AvaloniaEdit.xaml" />
		<StyleInclude Source="/ExtendedControlStyles.axaml"/>
    <Style>
      <Style.Resources>
        <!-- thicker scrollbar -->
        <sys:Double x:Key="ScrollBarThumbThickness">14</sys:Double>
      </Style.Resources>
    </Style>
  </Application.Styles>
</Application>