Update download system

Assets/YooAsset/Runtime/DownloadSystem/DownloadSystem.cs

@@ -154,6 +154,8 @@ namespace YooAsset
 			return CheckContentIntegrity(filePath, patchBundle.SizeBytes, patchBundle.CRC);
 		}
 		public static bool CheckContentIntegrity(string filePath, long size, string crc)
+		{
+			try
 			{
 				if (File.Exists(filePath) == false)
 					return false;
@@ -167,5 +169,10 @@ namespace YooAsset
 				string fileCRC = HashUtility.FileCRC32(filePath);
 				return fileCRC == crc;
 			}
+			catch(Exception)
+			{
+				return false;
+			}
+		}
 	}
 }

Assets/YooAsset/Runtime/PatchSystem/Operations/UpdateManifestOperation.cs

@@ -332,16 +332,8 @@ namespace YooAsset
 		}
 		private void VerifyInThread(object infoObj)
 		{
-			// 验证沙盒内的文件
 			ThreadInfo info = (ThreadInfo)infoObj;
-			try
-			{
 			info.Result = DownloadSystem.CheckContentIntegrity(info.FilePath, info.Bundle.SizeBytes, info.Bundle.CRC);
-			}
-			catch (Exception)
-			{
-				info.Result = false;
-			}
 			_syncContext.Post(VerifyCallback, info);
 		}
 		private void VerifyCallback(object obj)