Add reset option

KurtzPelRegionPicker/MainWindow.xaml

@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:KurtzPelRegionPicker"
         mc:Ignorable="d"
-        Title="KPRP" Height="190" Width="220"
+        Title="KPRP" Height="225" Width="220"
         ResizeMode="CanMinimize">
     <StackPanel Orientation="Vertical"
                 Margin="10">
@@ -19,5 +19,9 @@
                 Height="25"
                 Content="Apply"
                 Click="Button_Apply_Click" />
+        <Button Height="25"
+                Background="#FFD2D2"
+                Content="Reset"
+                Click="Button_Reset_Click" />
     </StackPanel>
 </Window>

KurtzPelRegionPicker/MainWindow.xaml.cs

@@ -55,6 +55,13 @@ namespace KurtzPelRegionPicker
             }
         }
 
+        private void Button_Reset_Click(object sender, RoutedEventArgs e)
+        {
+            ResetRegion();
+
+            MessageBox.Show("Region reset", "Success", MessageBoxButton.OK, MessageBoxImage.Information);
+        }
+
         private void ApplyRegion(Region source, Region destination)
         {
             string[] content = File.ReadAllLines(HOSTS_PATH);
@@ -85,6 +92,25 @@ namespace KurtzPelRegionPicker
             File.WriteAllLines(HOSTS_PATH, newContent);
         }
 
+        private void ResetRegion()
+        {
+            string[] content = File.ReadAllLines(HOSTS_PATH);
+
+            if (content.Contains(COMMENT))
+            {
+                // Purge
+                int index = content.IndexOf(COMMENT);
+
+                var list = content.ToList();
+
+                list.RemoveAt(index);
+                list.RemoveAt(index);
+
+                content = list.ToArray();
+                File.WriteAllLines(HOSTS_PATH, content);
+            }
+        }
+
         private string GetRealIP(string dns)
         {
             var process = new Process()