diff --git a/Ryujinx.CustomTasks/GenerateArrays.cs b/Ryujinx.CustomTasks/GenerateArrays.cs
index d65fad3..440f284 100644
--- a/Ryujinx.CustomTasks/GenerateArrays.cs
+++ b/Ryujinx.CustomTasks/GenerateArrays.cs
@@ -1,12 +1,13 @@
-using Microsoft.CodeAnalysis;
+using Microsoft.Build.Framework;
+using Microsoft.Build.Utilities;
+using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
-using Microsoft.Build.Framework;
+using Ryujinx.CustomTasks.Helper;
+using Ryujinx.CustomTasks.SyntaxWalker;
 using System.Collections.Generic;
 using System.IO;
-using Ryujinx.CustomTasks.SyntaxWalker;
-using Ryujinx.CustomTasks.Helper;
-using Task = Microsoft.Build.Utilities.Task;
+using System.Linq;
 
 namespace Ryujinx.CustomTasks
 {
@@ -54,8 +55,16 @@ namespace Ryujinx.CustomTasks
 
         private void AddGeneratedSource(string filePath, string content)
         {
+            if (File.Exists(filePath))
+            {
+                File.Delete(filePath);
+            }
+            else
+            {
+                _outputFiles.Add(filePath);
+            }
+
             File.WriteAllText(filePath, content);
-            _outputFiles.Add(filePath);
         }
 
         private ICollection<int> GetArraySizes(string itemPath)
@@ -173,9 +182,6 @@ namespace Ryujinx.CustomTasks
             string arraysFilePath = Path.Combine(OutputPath, ArraysFileName);
             List<int> arraySizes = new List<int>();
 
-            File.Delete(interfaceFilePath);
-            File.Delete(arraysFilePath);
-
             foreach (var item in InputFiles)
             {
                 string fullPath = item.GetMetadata("FullPath");
diff --git a/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs b/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
index 5882bbe..1205c61 100644
--- a/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
+++ b/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
@@ -6,7 +6,8 @@ namespace Ryujinx.CustomTasks.SyntaxWalker
 {
     class ArraySizeCollector : CSharpSyntaxWalker
     {
-        public ICollection<int> ArraySizes { get; } = new List<int>();
+        private readonly HashSet<int> _arraySizes = new HashSet<int>();
+        public ICollection<int> ArraySizes => _arraySizes;
 
         private void AddArrayString(string name)
         {
@@ -17,9 +18,9 @@ namespace Ryujinx.CustomTasks.SyntaxWalker
 
             string rawArrayType = name.Split('<')[0];
 
-            if (int.TryParse(rawArrayType.Substring(5), out int size) && !ArraySizes.Contains(size))
+            if (int.TryParse(rawArrayType.Substring(5), out int size))
             {
-                ArraySizes.Add(size);
+                _arraySizes.Add(size);
             }
         }