Updated version

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>5.4.2</PackageVersion>
+    <PackageVersion>5.4.3</PackageVersion>
-    <AssemblyVersion>5.4.2</AssemblyVersion>
+    <AssemblyVersion>5.4.3</AssemblyVersion>
-    <FileVersion>5.4.2</FileVersion>
+    <FileVersion>5.4.3</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>5.4.2 - Reverted socket changes as it seems to cause reconnect to hang</PackageReleaseNotes>
+    <PackageReleaseNotes>5.4.3 - Fixed potential threading exception in socket connection</PackageReleaseNotes>
     <Nullable>enable</Nullable>
     <LangVersion>9.0</LangVersion>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>

CryptoExchange.Net/Sockets/SocketConnection.cs

@@ -629,7 +629,11 @@ namespace CryptoExchange.Net.Sockets
                 return new CallResult<bool>(true);
             }
 
-            if (_subscriptions.Any(s => s.Authenticated))
+            bool anyAuthenticated = false;
+            lock (_subscriptionLock)
+                anyAuthenticated = _subscriptions.Any(s => s.Authenticated);
+
+            if (anyAuthenticated)
             {
                 // If we reconnected a authenticated connection we need to re-authenticate
                 var authResult = await ApiClient.AuthenticateSocketAsync(this).ConfigureAwait(false);

README.md

@@ -33,6 +33,9 @@ Make a one time donation in a crypto currency of your choice. If you prefer to d
 Alternatively, sponsor me on Github using [Github Sponsors](https://github.com/sponsors/JKorf). 
 
 ## Release notes
+* Version 5.4.3 - 14 Apr 2023
+    * Fixed potential threading exception in socket connection
+
 * Version 5.4.2 - 01 Apr 2023
     * Reverted socket changes as it seems to cause reconnect to hang