diff --git a/PCK-Studio/Extensions/AnimationExtensions.cs b/PCK-Studio/Extensions/AnimationExtensions.cs
index a16aa28f..81af938a 100644
--- a/PCK-Studio/Extensions/AnimationExtensions.cs
+++ b/PCK-Studio/Extensions/AnimationExtensions.cs
@@ -1,13 +1,5 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
+using System.Drawing;
 using AnimatedGif;
-using Newtonsoft.Json.Linq;
 using PckStudio.Internal;
 
 namespace PckStudio.Extensions
diff --git a/PCK-Studio/Extensions/ColorExtensions.cs b/PCK-Studio/Extensions/ColorExtensions.cs
index 958c6611..b11c0d5e 100644
--- a/PCK-Studio/Extensions/ColorExtensions.cs
+++ b/PCK-Studio/Extensions/ColorExtensions.cs
@@ -1,5 +1,4 @@
-using System;
-using System.Drawing;
+using System.Drawing;
 using System.Numerics;
 
 namespace PckStudio.Extensions
diff --git a/PCK-Studio/Extensions/GraphicsExtensions.cs b/PCK-Studio/Extensions/GraphicsExtensions.cs
index 2510ad9d..2cc33088 100644
--- a/PCK-Studio/Extensions/GraphicsExtensions.cs
+++ b/PCK-Studio/Extensions/GraphicsExtensions.cs
@@ -1,9 +1,5 @@
-using System;
-using System.Collections.Generic;
-using System.Drawing;
+using System.Drawing;
 using System.Drawing.Drawing2D;
-using System.Linq;
-using System.Text;
 
 namespace PckStudio.Extensions
 {
diff --git a/PCK-Studio/Extensions/ImageExtensions.cs b/PCK-Studio/Extensions/ImageExtensions.cs
index f7d08e3c..470822ef 100644
--- a/PCK-Studio/Extensions/ImageExtensions.cs
+++ b/PCK-Studio/Extensions/ImageExtensions.cs
@@ -23,7 +23,6 @@ using System.Drawing.Drawing2D;
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Linq;
-using PckStudio.Internal;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using PckStudio.Internal.App;
@@ -113,8 +112,6 @@ namespace PckStudio.Extensions
         private static Size CalculateImageSize(IEnumerable<Image> sources, ImageLayoutDirection layoutDirection)
         {
             Size size = sources.First().Size;
-            int width = size.Width;
-            int height = size.Height;
             int count = sources.Count();
 
             if (count < 2)
@@ -122,15 +119,15 @@ namespace PckStudio.Extensions
 
             var horizontal = layoutDirection == ImageLayoutDirection.Horizontal;
 
-            if (!sources.All(img => img.Width.Equals(width) && img.Height.Equals(height)))
+            if (!sources.All(img => img.Size == size))
                 throw new InvalidOperationException("Images must have the same width and height.");
 
             if (horizontal)
-                width *= count;
+                size.Width *= count;
             else
-                height *= count;
+                size.Height *= count;
 
-            return new Size(width, height);
+            return size;
         }
 
         internal static Image Resize(this Image image, Size size, GraphicsConfig graphicsConfig)
diff --git a/PCK-Studio/Extensions/LocFileExtensions.cs b/PCK-Studio/Extensions/LocFileExtensions.cs
index e8d22004..7ce2ecde 100644
--- a/PCK-Studio/Extensions/LocFileExtensions.cs
+++ b/PCK-Studio/Extensions/LocFileExtensions.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using OMI.Formats.Languages;
+using OMI.Formats.Languages;
 
 namespace PckStudio.Extensions
 {
diff --git a/PCK-Studio/Extensions/MaterialContainerExtensions.cs b/PCK-Studio/Extensions/MaterialContainerExtensions.cs
index d680a9c5..a4a83581 100644
--- a/PCK-Studio/Extensions/MaterialContainerExtensions.cs
+++ b/PCK-Studio/Extensions/MaterialContainerExtensions.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using OMI.Formats.Material;
+using OMI.Formats.Material;
 
 namespace PckStudio.Extensions
 {
diff --git a/PCK-Studio/Extensions/MathExtensions.cs b/PCK-Studio/Extensions/MathExtensions.cs
index 9d2f6475..5a162631 100644
--- a/PCK-Studio/Extensions/MathExtensions.cs
+++ b/PCK-Studio/Extensions/MathExtensions.cs
@@ -1,8 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace PckStudio.Extensions
 {
diff --git a/PCK-Studio/Extensions/PckAssetExtensions.cs b/PCK-Studio/Extensions/PckAssetExtensions.cs
index 093b18c7..0ddd1570 100644
--- a/PCK-Studio/Extensions/PckAssetExtensions.cs
+++ b/PCK-Studio/Extensions/PckAssetExtensions.cs
@@ -1,20 +1,17 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Drawing;
-using System.Drawing.Imaging;
 using System.IO;
-using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 using OMI.Formats.Languages;
 using OMI.Formats.Pck;
 using OMI.Workers;
-using PckStudio.Internal;
 using PckStudio.Interfaces;
 using PckStudio.Internal.Deserializer;
 using PckStudio.Internal.Serializer;
 using PckStudio.Internal.Skin;
+using System.Linq;
+using System.Diagnostics;
 
 namespace PckStudio.Extensions
 {
diff --git a/PCK-Studio/Extensions/PckFileExtensions.cs b/PCK-Studio/Extensions/PckFileExtensions.cs
index 876305e9..218f52a0 100644
--- a/PCK-Studio/Extensions/PckFileExtensions.cs
+++ b/PCK-Studio/Extensions/PckFileExtensions.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using OMI.Formats.Pck;
+using OMI.Formats.Pck;
 using OMI.Workers;
 
 namespace PckStudio.Extensions
diff --git a/PCK-Studio/Extensions/PictureBoxExtensions.cs b/PCK-Studio/Extensions/PictureBoxExtensions.cs
index 6ae7dc97..75ee7c6c 100644
--- a/PCK-Studio/Extensions/PictureBoxExtensions.cs
+++ b/PCK-Studio/Extensions/PictureBoxExtensions.cs
@@ -1,9 +1,5 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Reflection;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace PckStudio.Extensions
diff --git a/PCK-Studio/Extensions/TreeNodeExtensions.cs b/PCK-Studio/Extensions/TreeNodeExtensions.cs
index 1bd792c5..90cad0be 100644
--- a/PCK-Studio/Extensions/TreeNodeExtensions.cs
+++ b/PCK-Studio/Extensions/TreeNodeExtensions.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Collections.Generic;
 using System.Windows.Forms;
 
 namespace PckStudio.Extensions
diff --git a/PCK-Studio/Extensions/TreeViewExtensions.cs b/PCK-Studio/Extensions/TreeViewExtensions.cs
index f24ea3ab..79f36ddb 100644
--- a/PCK-Studio/Extensions/TreeViewExtensions.cs
+++ b/PCK-Studio/Extensions/TreeViewExtensions.cs
@@ -1,10 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
-using PckStudio.Internal.App;
 
 namespace PckStudio.Extensions
 {