diff --git a/ClickableTransparentOverlay/ImGuiController.cs b/ClickableTransparentOverlay/ImGuiController.cs
index 15ded5f..813eab6 100644
--- a/ClickableTransparentOverlay/ImGuiController.cs
+++ b/ClickableTransparentOverlay/ImGuiController.cs
@@ -370,11 +370,7 @@ namespace ClickableTransparentOverlay
             this.pipeline.Dispose();
             this.mainResourceSet.Dispose();
             this.fontTextureResourceSet.Dispose();
-
-            foreach (IDisposable resource in this.ownedResources)
-            {
-                resource.Dispose();
-            }
+            this.ClearCachedImageResources();
         }
 
         /// <summary>
diff --git a/ClickableTransparentOverlay/NativeMethods.cs b/ClickableTransparentOverlay/NativeMethods.cs
index 22d1a4a..4194a89 100644
--- a/ClickableTransparentOverlay/NativeMethods.cs
+++ b/ClickableTransparentOverlay/NativeMethods.cs
@@ -79,7 +79,7 @@ namespace ClickableTransparentOverlay
             private int top;
             private int bottom;
 
-            public static Margins FromRectangle(System.Drawing.Rectangle rectangle)
+            public static Margins FromRectangle(Rectangle rectangle)
             {
                 var margins = new Margins
                 {