Before Rebuild NetProvider

Src/Core/Utility/StopWatcher.cs

@@ -9,11 +9,11 @@ namespace BITKit
         private readonly Stopwatch _stopwatch = new Stopwatch();
         private readonly ILogger _logger;
         private readonly string _message;
-        public StopWatcher(ILogger logger,string message)
+        public StopWatcher(ILogger logger,string message=null)
         {
             _logger = logger;
             _message = message;
-          
+           
                 _logger.LogInformation($"开始计时:{message}");
                 
                 _stopwatch.Start();