Updated version

CryptoExchange.Net/Clients/RestApiClient.cs

@@ -92,7 +92,7 @@ namespace CryptoExchange.Net
                 }
 
                 // Calculate time offset between local and server
-                var offset = result.Data - localTime;
+                var offset = result.Data - (localTime.AddMilliseconds(result.ResponseTime!.Value.TotalMilliseconds / 2));
                 timeSyncParams.UpdateTimeOffset(offset);
                 timeSyncParams.TimeSyncState.Semaphore.Release();                
             }

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -6,16 +6,16 @@
     <PackageId>CryptoExchange.Net</PackageId>
     <Authors>JKorf</Authors>
     <Description>A base package for implementing cryptocurrency API's</Description>
-    <PackageVersion>5.1.8</PackageVersion>
-    <AssemblyVersion>5.1.8</AssemblyVersion>
-    <FileVersion>5.1.8</FileVersion>
+    <PackageVersion>5.1.9</PackageVersion>
+    <AssemblyVersion>5.1.9</AssemblyVersion>
+    <FileVersion>5.1.9</FileVersion>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <RepositoryType>git</RepositoryType>
     <RepositoryUrl>https://github.com/JKorf/CryptoExchange.Net.git</RepositoryUrl>
     <PackageProjectUrl>https://github.com/JKorf/CryptoExchange.Net</PackageProjectUrl>
     <NeutralLanguage>en</NeutralLanguage>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <PackageReleaseNotes>5.1.8 - Cleanup socket code, fixed an issue which could cause connections to never reconnect when connection was lost, Added support for sending requests which expect an empty response, Fixed issue with the DateTimeConverter date interpretation</PackageReleaseNotes>
+    <PackageReleaseNotes>5.1.9 - Added latency to the timesync calculation, Small fix for exception in socket close handling</PackageReleaseNotes>
     <Nullable>enable</Nullable>
     <LangVersion>9.0</LangVersion>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>

CryptoExchange.Net/Sockets/CryptoExchangeWebSocketClient.cs

@@ -280,8 +280,14 @@ namespace CryptoExchange.Net.Sockets
             _sendEvent.Set();
 
             if (_socket.State == WebSocketState.Open)
-                await _socket.CloseOutputAsync(WebSocketCloseStatus.NormalClosure, "Closing", default).ConfigureAwait(false);
-
+            {
+                try
+                {
+                    await _socket.CloseOutputAsync(WebSocketCloseStatus.NormalClosure, "Closing", default).ConfigureAwait(false);
+                }
+                catch(Exception)
+                { } // Can sometimes throw an exception when socket is in aborted state due to timing
+            }
             log.Write(LogLevel.Debug, $"Socket {Id} closed");
             Handle(closeHandlers);
         }

README.md

@@ -18,6 +18,10 @@ I develop and maintain this package on my own for free in my spare time. Donatio
 Alternatively, sponsor me on Github using [Github Sponsors](https://github.com/sponsors/JKorf)  
 
 ## Release notes
+* Version 5.1.9 - 08 May 2022
+    * Added latency to the timesync calculation
+    * Small fix for exception in socket close handling
+
 * Version 5.1.8 - 01 May 2022
     * Cleanup socket code, fixed an issue which could cause connections to never reconnect when connection was lost
     * Added support for sending requests which expect an empty response