more tweaks

src/modules/fancyzones/editor/FancyZonesEditor/App.xaml.cs

@@ -7,7 +7,6 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
 using System.IO;
-using System.IO.Abstractions;
 using System.Linq;
 using System.Text;
 using System.Windows;
@@ -42,8 +41,6 @@ namespace FancyZonesEditor
         private const string CrashReportDynamicAssemblyTag = "dynamic assembly doesn't have location";
         private const string CrashReportLocationNullTag = "location is null or empty";
 
-        private readonly IFileSystem _fileSystem = new FileSystem();
-
         public MainWindowSettingsModel MainWindowSettings { get; }
 
         public static FancyZonesEditorIO FancyZonesEditorIO { get; private set; }

src/modules/fancyzones/editor/FancyZonesEditor/Models/MainWindowSettingsModel.cs

@@ -40,15 +40,10 @@ namespace FancyZonesEditor
         public const ushort _blankCustomModelId = 0xFFFA;
         public const ushort _lastDefinedId = _blankCustomModelId;
 
-        private const int MaxNegativeSpacing = -10;
-
         // Non-localizable strings
         public static readonly string RegistryPath = "SOFTWARE\\SuperFancyZones";
         public static readonly string FullRegistryPath = "HKEY_CURRENT_USER\\" + RegistryPath;
 
-        private const string LayoutTypeBlankStr = "blank";
-        private const string NullUuidStr = "null";
-
         // hard coded data for all the "Priority Grid" configurations that are unique to "Grid"
         private static readonly byte[][] _priorityData = new byte[][]
         {

src/modules/fancyzones/editor/FancyZonesEditor/Utils/RelayCommand.cs

@@ -22,7 +22,7 @@ namespace FancyZonesEditor.Utils
         {
             if (execute == null)
             {
-                throw new ArgumentNullException("execute");
+                throw new ArgumentNullException(nameof(execute));
             }
 
             _execute = execute;

src/modules/fancyzones/editor/FancyZonesEditor/Utils/RelayCommand`1.cs

@@ -22,7 +22,7 @@ namespace FancyZonesEditor.Utils
         {
             if (execute == null)
             {
-                throw new ArgumentNullException("execute");
+                throw new ArgumentNullException(nameof(execute));
             }
 
             _execute = execute;