diff --git a/DepotDownloader/AnsiDetector.cs b/DepotDownloader/AnsiDetector.cs
index 5f157da3..f7f8a420 100644
--- a/DepotDownloader/AnsiDetector.cs
+++ b/DepotDownloader/AnsiDetector.cs
@@ -7,7 +7,6 @@ using System;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text.RegularExpressions;
-using Microsoft.Win32.SafeHandles;
 using Windows.Win32;
 using Windows.Win32.System.Console;
 
diff --git a/DepotDownloader/ContentDownloader.cs b/DepotDownloader/ContentDownloader.cs
index 462ef33d..f4de1f61 100644
--- a/DepotDownloader/ContentDownloader.cs
+++ b/DepotDownloader/ContentDownloader.cs
@@ -363,7 +363,7 @@ namespace DepotDownloader
             }
             else
             {
-                await DownloadAppAsync(appId, new List<(uint, ulong)> { (appId, ugcId) }, DEFAULT_BRANCH, null, null, null, false, true);
+                await DownloadAppAsync(appId, [(appId, ugcId)], DEFAULT_BRANCH, null, null, null, false, true);
             }
         }
 
@@ -1400,7 +1400,7 @@ namespace DepotDownloader
 
             foreach (var file in manifest.Files)
             {
-                var sha1Hash = BitConverter.ToString(file.FileHash).Replace("-", "");
+                var sha1Hash = Convert.ToHexString(file.FileHash);
                 sw.WriteLine($"{file.TotalSize,14} {file.Chunks.Count,6} {sha1Hash} {file.Flags,5:D} {file.FileName}");
             }
         }
diff --git a/DepotDownloader/PlatformUtilities.cs b/DepotDownloader/PlatformUtilities.cs
index a4f8fd77..819ec411 100644
--- a/DepotDownloader/PlatformUtilities.cs
+++ b/DepotDownloader/PlatformUtilities.cs
@@ -1,7 +1,6 @@
 // This file is subject to the terms and conditions defined
 // in file 'LICENSE', which is part of this source code package.
 
-using System;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Runtime.Versioning;
diff --git a/DepotDownloader/Steam3Session.cs b/DepotDownloader/Steam3Session.cs
index 5d757df7..64feafed 100644
--- a/DepotDownloader/Steam3Session.cs
+++ b/DepotDownloader/Steam3Session.cs
@@ -89,7 +89,7 @@ namespace DepotDownloader
 
         public delegate bool WaitCondition();
 
-        private readonly object steamLock = new();
+        private readonly Lock steamLock = new();
 
         public bool WaitUntilCallback(Action submitter, WaitCondition waiter)
         {