diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/IViewModel.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/IViewModel.cs
index 928779d7..111f5cc7 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/IViewModel.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/IViewModel.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace PhotoFrame.Logic.UI.ViewModels
+namespace PhotoFrame.Logic.UI.ViewModels
 {
     /// <summary>
     /// Marker interface for view models
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBase.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBase.cs
index 9d658b80..95e54b6b 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBase.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBase.cs
@@ -1,10 +1,8 @@
 using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.ViewModels
 {
@@ -12,24 +10,20 @@ namespace PhotoFrame.Logic.UI.ViewModels
     {
         public event PropertyChangedEventHandler PropertyChanged;
         protected IFrameController FrameController { get; }
-        protected IFrameConfig FrameConfig;
+        protected readonly IFrameConfig FrameConfig;
         
+        // ReSharper disable once MemberCanBePrivate.Global
         public bool IsStopped { get; private set; }
 
-        private string _ImageUri = "";
+        private string _imageUri = "";
         public string ImageUri
         {
-            get
-            {
-                return _ImageUri;
-            }
+            get => _imageUri;
             private set
             {
-                if(!string.Equals(_ImageUri, value))
-                {
-                    _ImageUri = value;
-                    RaisePropertyChanged();
-                }
+                if (string.Equals(_imageUri, value)) return;
+                _imageUri = value;
+                RaisePropertyChanged();
             }
         }
 
@@ -39,16 +33,16 @@ namespace PhotoFrame.Logic.UI.ViewModels
             FrameController.CurrentPhotoChanged -= FrameController_CurrentPhotoChanged;
         }
 
-        private static int _Counter = 0;
+        private static int _counter;
 
-        public ViewModelBase(IFrameController frameController, IFrameConfig config)
+        protected ViewModelBase(IFrameController frameController, IFrameConfig config)
         {
             FrameController = frameController;
             FrameConfig = config;
             ImageUri = frameController.CurrentPhoto;
             FrameController.CurrentPhotoChanged += FrameController_CurrentPhotoChanged;
-            _Counter++;
-            Console.WriteLine($"Number of ViewModels: {_Counter}");
+            _counter++;
+            Console.WriteLine($"Number of ViewModels: {_counter}");
         }
 
         private void FrameController_CurrentPhotoChanged(object sender, CurrentPhotoChangedEventArgs e)
@@ -61,8 +55,8 @@ namespace PhotoFrame.Logic.UI.ViewModels
 
         ~ViewModelBase()
         {
-            _Counter--;
-            Console.WriteLine($"Number of ViewModels: {_Counter}");
+            _counter--;
+            Console.WriteLine($"Number of ViewModels: {_counter}");
         }
 
         protected void RaisePropertyChanged([CallerMemberName]string propertyName = "")
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBorder.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBorder.cs
index 731434fe..a94b2544 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBorder.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelBorder.cs
@@ -1,9 +1,6 @@
 using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
-using System;
-using System.Collections.Generic;
 using System.Drawing;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.ViewModels
 {
@@ -22,7 +19,7 @@ namespace PhotoFrame.Logic.UI.ViewModels
 
         private string ColorToString(Color color)
         {
-            return $"#{color.R.ToString("x2")}{color.G.ToString("x2")}{color.B.ToString("x2")}";
+            return $"#{color.R:x2}{color.G:x2}{color.B:x2}";
         }
     }
 }
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelColorize.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelColorize.cs
index fb7fa10b..c9ed4159 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelColorize.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelColorize.cs
@@ -1,8 +1,5 @@
 using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.ViewModels
 {
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelNormal.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelNormal.cs
index 40546d87..995ae04c 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelNormal.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewModelNormal.cs
@@ -1,8 +1,5 @@
 using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.ViewModels
 {
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewSwitchInfo.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewSwitchInfo.cs
index 2820248b..32659f99 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewSwitchInfo.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/ViewModels/ViewSwitchInfo.cs
@@ -1,7 +1,4 @@
 using PhotoFrame.Logic.BL;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.ViewModels
 {
@@ -14,9 +11,13 @@ namespace PhotoFrame.Logic.UI.ViewModels
             SwitchType = switchType;
         }
 
+        // ReSharper disable once AutoPropertyCanBeMadeGetOnly.Local
         public string ViewResourceId { get; private set; }
+        // ReSharper disable once AutoPropertyCanBeMadeGetOnly.Local
         public IViewModel ViewModel { get; private set; }
+        // ReSharper disable once AutoPropertyCanBeMadeGetOnly.Local
         public ViewSwitchType SwitchType { get; private set; }
+        // ReSharper disable once UnusedMember.Global
         public string SwitchTypeString => SwitchType.ToString();
     }
 }
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IView.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IView.cs
index 8e28fbc4..0f29bc43 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IView.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IView.cs
@@ -1,7 +1,4 @@
 using PhotoFrame.Logic.BL;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.Views
 {
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IViewManager.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IViewManager.cs
index f1fad6ff..de70ca77 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IViewManager.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/IViewManager.cs
@@ -1,7 +1,4 @@
 using PhotoFrame.Logic.BL;
-using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace PhotoFrame.Logic.UI.Views
 {
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBase.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBase.cs
index 36086085..805e6e16 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBase.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBase.cs
@@ -6,17 +6,17 @@ namespace PhotoFrame.Logic.UI.Views
 {
     public abstract class ViewBase : IView
     {
-        private string _Uri;
+        private readonly string _uri;
 
-        protected IAppModel AppModel { get; }
+        private IAppModel AppModel { get; }
         protected IFrameController FrameController { get; }
         protected IFrameConfig FrameConfig { get; }
 
         public IViewModel ViewModel { get; private set; }
 
-        public ViewBase(string uri, IAppModel appModel, IFrameController frameController, IFrameConfig frameConfig)
+        protected ViewBase(string uri, IAppModel appModel, IFrameController frameController, IFrameConfig frameConfig)
         {
-            _Uri = uri;
+            _uri = uri;
             AppModel = appModel;
             FrameController = frameController;
             FrameConfig = frameConfig;
@@ -25,7 +25,7 @@ namespace PhotoFrame.Logic.UI.Views
         public void Activate(ViewSwitchType switchType)
         {
             ViewModel = CreateViewModel();
-            AppModel.SwitchToView(new ViewSwitchInfo(_Uri, ViewModel, switchType));
+            AppModel.SwitchToView(new ViewSwitchInfo(_uri, ViewModel, switchType));
         }
 
         public void Deactivate()
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBorder.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBorder.cs
index 622d7f8b..e32c25ad 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBorder.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewBorder.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Drawing;
-using System.Text;
-using PhotoFrame.Logic.BL;
+using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
 using PhotoFrame.Logic.UI.ViewModels;
 
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewColorize.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewColorize.cs
index b1befe58..1a4af896 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewColorize.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewColorize.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using PhotoFrame.Logic.BL;
+using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
 using PhotoFrame.Logic.UI.ViewModels;
 
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewManager.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewManager.cs
index 60de3962..197ba2f6 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewManager.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewManager.cs
@@ -1,6 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Text;
 using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
 
@@ -8,15 +6,15 @@ namespace PhotoFrame.Logic.UI.Views
 {
     public class ViewManager : IViewManager
     {
-        private IAppModel _AppModel;
-        private IFrameController _FrameController;
-        private IFrameConfig _FrameConfig;
+        private readonly IAppModel _appModel;
+        private readonly IFrameController _frameController;
+        private readonly IFrameConfig _frameConfig;
 
         public ViewManager(IAppModel appModel, IFrameController frameController, IFrameConfig frameConfig)
         {
-            _AppModel = appModel;
-            _FrameController = frameController;
-            _FrameConfig = frameConfig;
+            _appModel = appModel;
+            _frameController = frameController;
+            _frameConfig = frameConfig;
         }
 
         public IView CreateView(ViewType viewType)
@@ -24,11 +22,11 @@ namespace PhotoFrame.Logic.UI.Views
             switch(viewType)
             {
                 case ViewType.Normal:
-                    return new ViewNormal(_AppModel, _FrameController, _FrameConfig);
+                    return new ViewNormal(_appModel, _frameController, _frameConfig);
                 case ViewType.Border:
-                    return new ViewBorder(_AppModel, _FrameController, _FrameConfig);
+                    return new ViewBorder(_appModel, _frameController, _frameConfig);
                 case ViewType.Colorized:
-                    return new ViewColorize(_AppModel, _FrameController, _FrameConfig);
+                    return new ViewColorize(_appModel, _frameController, _frameConfig);
                 default:
                     throw new NotSupportedException($"ViewType [{viewType}] not supported!");
             }
diff --git a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewNormal.cs b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewNormal.cs
index 18500de3..3c4205c3 100644
--- a/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewNormal.cs
+++ b/samples/PhotoFrame/PhotoFrame.Logic/UI/Views/ViewNormal.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using PhotoFrame.Logic.BL;
+using PhotoFrame.Logic.BL;
 using PhotoFrame.Logic.Config;
 using PhotoFrame.Logic.UI.ViewModels;