diff --git a/src/DotNetCore.CAP.NATS/NATSConsumerClient.cs b/src/DotNetCore.CAP.NATS/NATSConsumerClient.cs
index 6c37b82..b805a58 100644
--- a/src/DotNetCore.CAP.NATS/NATSConsumerClient.cs
+++ b/src/DotNetCore.CAP.NATS/NATSConsumerClient.cs
@@ -70,13 +70,15 @@ namespace DotNetCore.CAP.NATS
         private void Subscription_MessageHandler(object sender, MsgHandlerEventArgs e)
         {
             var headers = new Dictionary<string, string>();
+          
             foreach (string h in e.Message.Header.Keys)
             {
                 headers.Add(h, e.Message.Header[h]);
             }
-            var tranmessage = new TransportMessage(headers, e.Message.Data);
-            tranmessage.Headers.Add(Headers.Group, _groupId);
-            OnMessageReceived?.Invoke(e.Message.Reply, tranmessage);
+
+            headers.Add(Headers.Group, _groupId);
+
+            OnMessageReceived?.Invoke(e.Message.Reply, new TransportMessage(headers, e.Message.Data));
         }
 
         public void Commit(object sender)
diff --git a/src/DotNetCore.CAP/Internal/Helper.cs b/src/DotNetCore.CAP/Internal/Helper.cs
index 2650554..2b3d64a 100644
--- a/src/DotNetCore.CAP/Internal/Helper.cs
+++ b/src/DotNetCore.CAP/Internal/Helper.cs
@@ -66,7 +66,6 @@ namespace DotNetCore.CAP.Internal
 
         public static bool IsInnerIP(string ipAddress)
         {
-            bool isInnerIp;
             var ipNum = GetIpNum(ipAddress);
 
             //Private IP：
@@ -80,9 +79,9 @@ namespace DotNetCore.CAP.Internal
             var bEnd = GetIpNum("172.31.255.255");
             var cBegin = GetIpNum("192.168.0.0");
             var cEnd = GetIpNum("192.168.255.255");
-            isInnerIp = IsInner(ipNum, aBegin, aEnd) || IsInner(ipNum, bBegin, bEnd) || IsInner(ipNum, cBegin, cEnd);
-            return isInnerIp;
+            return IsInner(ipNum, aBegin, aEnd) || IsInner(ipNum, bBegin, bEnd) || IsInner(ipNum, cBegin, cEnd);
         }
+
         private static long GetIpNum(string ipAddress)
         {
             var ip = ipAddress.Split('.');
diff --git a/src/DotNetCore.CAP/Internal/ICapPublisher.Default.cs b/src/DotNetCore.CAP/Internal/ICapPublisher.Default.cs
index 2841f04..1b9c7b4 100644
--- a/src/DotNetCore.CAP/Internal/ICapPublisher.Default.cs
+++ b/src/DotNetCore.CAP/Internal/ICapPublisher.Default.cs
@@ -30,7 +30,7 @@ namespace DotNetCore.CAP.Internal
             ServiceProvider = service;
             _dispatcher = service.GetRequiredService<IDispatcher>();
             _storage = service.GetRequiredService<IDataStorage>();
-            _capOptions = service.GetService<IOptions<CapOptions>>().Value;
+            _capOptions = service.GetRequiredService<IOptions<CapOptions>>().Value;
             Transaction = new AsyncLocal<ICapTransaction>();
         }
 
diff --git a/src/DotNetCore.CAP/Processor/IProcessor.Collector.cs b/src/DotNetCore.CAP/Processor/IProcessor.Collector.cs
index d1673f1..1ad0a70 100644
--- a/src/DotNetCore.CAP/Processor/IProcessor.Collector.cs
+++ b/src/DotNetCore.CAP/Processor/IProcessor.Collector.cs
@@ -27,7 +27,7 @@ namespace DotNetCore.CAP.Processor
             _serviceProvider = serviceProvider;
             _waitingInterval = TimeSpan.FromSeconds(options.Value.CollectorCleaningInterval);
 
-            var initializer = _serviceProvider.GetService<IStorageInitializer>();
+            var initializer = _serviceProvider.GetRequiredService<IStorageInitializer>();
 
             _tableNames = new[] { initializer.GetPublishedTableName(), initializer.GetReceivedTableName() };
         }
@@ -42,7 +42,7 @@ namespace DotNetCore.CAP.Processor
                 var time = DateTime.Now;
                 do
                 {
-                    deletedCount = await _serviceProvider.GetService<IDataStorage>()
+                    deletedCount = await _serviceProvider.GetRequiredService<IDataStorage>()
                         .DeleteExpiresAsync(table, time, ItemBatch, context.CancellationToken);
 
                     if (deletedCount != 0)