diff --git a/Ryujinx.CustomTasks/GenerateArrays.cs b/Ryujinx.CustomTasks/GenerateArrays.cs
index d65fad3..70f91f1 100644
--- a/Ryujinx.CustomTasks/GenerateArrays.cs
+++ b/Ryujinx.CustomTasks/GenerateArrays.cs
@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.IO;
 using Ryujinx.CustomTasks.SyntaxWalker;
 using Ryujinx.CustomTasks.Helper;
+using System.Linq;
 using Task = Microsoft.Build.Utilities.Task;
 
 namespace Ryujinx.CustomTasks
@@ -15,7 +16,7 @@ namespace Ryujinx.CustomTasks
         private const string InterfaceFileName = "IArray.g.cs";
         private const string ArraysFileName = "Arrays.g.cs";
 
-        private readonly List<string> _outputFiles = new List<string>();
+        private readonly HashSet<string> _outputFiles = new HashSet<string>();
 
         [Required]
         public string ArrayNamespace { get; set; }
@@ -58,7 +59,7 @@ namespace Ryujinx.CustomTasks
             _outputFiles.Add(filePath);
         }
 
-        private ICollection<int> GetArraySizes(string itemPath)
+        private HashSet<int> GetArraySizes(string itemPath)
         {
             Log.LogMessage(MessageImportance.Low, $"Searching for StructArray types in: {itemPath}");
 
diff --git a/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs b/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
index 5882bbe..832caaf 100644
--- a/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
+++ b/Ryujinx.CustomTasks/SyntaxWalker/ArraySizeCollector.cs
@@ -6,7 +6,7 @@ namespace Ryujinx.CustomTasks.SyntaxWalker
 {
     class ArraySizeCollector : CSharpSyntaxWalker
     {
-        public ICollection<int> ArraySizes { get; } = new List<int>();
+        public HashSet<int> ArraySizes { get; } = new HashSet<int>();
 
         private void AddArrayString(string name)
         {
@@ -17,7 +17,7 @@ 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);
             }