Updated to version 10.2.4

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -6,9 +6,9 @@
     <PackageId>CryptoExchange.Net</PackageId>
     <Authors>JKorf</Authors>
     <Description>CryptoExchange.Net is a base library which is used to implement different cryptocurrency (exchange) API's. It provides a standardized way of implementing different API's, which results in a very similar experience for users of the API implementations.</Description>
-    <PackageVersion>10.2.3</PackageVersion>
+    <PackageVersion>10.2.4</PackageVersion>
-    <AssemblyVersion>10.2.3</AssemblyVersion>
+    <AssemblyVersion>10.2.4</AssemblyVersion>
-    <FileVersion>10.2.3</FileVersion>
+    <FileVersion>10.2.4</FileVersion>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>OKX;OKX.Net;Mexc;Mexc.Net;Kucoin;Kucoin.Net;Kraken;Kraken.Net;Huobi;Huobi.Net;CoinEx;CoinEx.Net;Bybit;Bybit.Net;Bitget;Bitget.Net;Bitfinex;Bitfinex.Net;Binance;Binance.Net;CryptoCurrency;CryptoCurrency Exchange;CryptoExchange.Net</PackageTags>
     <RepositoryType>git</RepositoryType>

CryptoExchange.Net/OrderBook/SymbolOrderBook.cs

@@ -640,6 +640,34 @@ namespace CryptoExchange.Net.OrderBook
             return new CallResult<bool>(true);
         }
 
+        /// <summary>
+        /// Wait until an update has been buffered
+        /// </summary>
+        /// <param name="timeout">Max wait time</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns></returns>
+        protected async Task<CallResult<bool>> WaitUntilFirstUpdateBufferedAsync(TimeSpan timeout, CancellationToken ct)
+        {
+            var startWait = DateTime.UtcNow;
+            while (_processBuffer.Count == 0)
+            {
+                if (ct.IsCancellationRequested)
+                    return new CallResult<bool>(new CancellationRequestedError());
+
+                if (DateTime.UtcNow - startWait > timeout)
+                    return new CallResult<bool>(new ServerError(new ErrorInfo(ErrorType.OrderBookTimeout, "Timeout while waiting for data")));
+
+                try
+                {
+                    await Task.Delay(20, ct).ConfigureAwait(false);
+                }
+                catch (OperationCanceledException)
+                { }
+            }
+
+            return new CallResult<bool>(true);
+        }
+
         /// <summary>
         /// IDisposable implementation for the order book
         /// </summary>
@@ -1002,7 +1030,8 @@ namespace CryptoExchange.Net.OrderBook
 
         private SequenceNumberResult ValidateLiveSequenceNumber(long sequenceNumber)
         {
-            if (sequenceNumber < LastSequenceNumber)
+            if (sequenceNumber < LastSequenceNumber 
+                && (_firstUpdateAfterSnapshotDone || !_skipSequenceCheckFirstUpdateAfterSnapshotSet))
                 // Update is somehow from before the current state
                 return SequenceNumberResult.OutOfSync;
 

README.md

@@ -66,6 +66,12 @@ 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 10.2.4 - 17 Jan 2026
+    * Added WaitUntilFirstUpdateBufferedAsync method on SymbolOrderBook
+    * Added some util methods
+    * Added CommaSplitStringConverter
+    * Fixed sequence validation bug SymbolOrderBook
+
 * Version 10.2.3 - 14 Jan 2026
     * Added HandleUnhandledMessage virtual method to SocketApiClient to allow some processing for messages which couldn't be mapped via the normal way
     * Fixed semaphore exception when creating a new REST client while time sync is in progress on another client