diff --git a/ProjBobcat/ProjBobcat/Class/Helper/DownloadHelper.cs b/ProjBobcat/ProjBobcat/Class/Helper/DownloadHelper.cs
index 56c27e33..4be57f5d 100644
--- a/ProjBobcat/ProjBobcat/Class/Helper/DownloadHelper.cs
+++ b/ProjBobcat/ProjBobcat/Class/Helper/DownloadHelper.cs
@@ -25,7 +25,7 @@ public static class DownloadHelper
     /// <summary>
     ///     下载线程
     /// </summary>
-    public static int DownloadThread { get; set; }
+    public static int DownloadThread { get; set; } = 8;
 
     static HttpClient DataClient => HttpClientHelper.GetNewClient(HttpClientHelper.DataClientName);
 
diff --git a/ProjBobcat/ProjBobcat/DefaultComponent/DefaultResourceCompleter.cs b/ProjBobcat/ProjBobcat/DefaultComponent/DefaultResourceCompleter.cs
index 20207b16..6627483a 100644
--- a/ProjBobcat/ProjBobcat/DefaultComponent/DefaultResourceCompleter.cs
+++ b/ProjBobcat/ProjBobcat/DefaultComponent/DefaultResourceCompleter.cs
@@ -25,8 +25,8 @@ public class DefaultResourceCompleter : IResourceCompleter
 
     bool disposedValue;
 
-    public int TotalDownloaded { get; set; }
-    public int NeedToDownload { get; set; }
+    public int TotalDownloaded { get; private set; }
+    public int NeedToDownload { get; private set; }
 
     public int DownloadParts { get; set; } = 16;
     public int TotalRetry { get; set; }
@@ -64,8 +64,7 @@ public event EventHandler<DownloadFileCompletedEventArgs> DownloadFileCompletedE
         var totalLostFiles = new List<IGameResource>();
         foreach (var resolver in ResourceInfoResolvers)
         {
-            var handler = (EventHandler<GameResourceInfoResolveEventArgs>) _listEventDelegates[ResolveEventKey]!;
-            if (handler != null)
+            if (_listEventDelegates[ResolveEventKey] is EventHandler<GameResourceInfoResolveEventArgs> handler)
                 resolver.GameResourceInfoResolveEvent += handler;
 
             var lostFiles = await resolver.ResolveResourceAsync();
diff --git a/ProjBobcat/ProjBobcat/Interface/IResourceCompleter.cs b/ProjBobcat/ProjBobcat/Interface/IResourceCompleter.cs
index 3df12103..c1c3b0b1 100644
--- a/ProjBobcat/ProjBobcat/Interface/IResourceCompleter.cs
+++ b/ProjBobcat/ProjBobcat/Interface/IResourceCompleter.cs
@@ -23,8 +23,8 @@ public interface IResourceCompleter : IDisposable
     /// </summary>
     bool CheckFile { get; set; }
 
-    public int TotalDownloaded { get; set; }
-    public int NeedToDownload { get; set; }
+    public int TotalDownloaded { get; }
+    public int NeedToDownload { get; }
 
     /// <summary>
     ///     游戏资源解析器集合