Merge pull request #192 from GID0317/#140

Fix #140

Author: NotYoojun

source/iNKORE.UI.WPF.Modern.Gallery/Pages/Controls/Windows/TreeViewPage.xaml

@@ -21,7 +21,7 @@
 
         <DataTemplate x:Key="FileTemplate">
             <StackPanel Orientation="Horizontal">
-                <Image Width="20" Source="/Assets/file.png" />
+                <ui:FontIcon Icon="{x:Static ui:SegoeFluentIcons.Document}" FontSize="20"/>
                 <TextBlock Margin="0,0,10,0" />
                 <TextBlock Text="{Binding Name}" />
             </StackPanel>

source/iNKORE.UI.WPF.Modern.Gallery/Pages/Controls/Windows/TreeViewPage.xaml.cs

@@ -348,7 +348,7 @@ private void NotifyPropertyChanged(String propertyName)
 
     <DataTemplate x:Key=""FileTemplate"">
         <StackPanel Orientation=""Horizontal"">
-            <Image Width=""20"" Source=""/Assets/file.png"" />
+            <ui:FontIcon Icon=""{{x:Static ui:SegoeFluentIcons.Document}}"" FontSize=""20""/>
             <TextBlock Margin=""0,0,10,0"" />
             <TextBlock Text=""{{Binding Name}}"" />
         </StackPanel>