Fixed failed ISymbolOrderBook start potentially leaving a pending background task

CryptoExchange.Net/Clients/RestApiClient.cs

@@ -198,7 +198,7 @@ namespace CryptoExchange.Net.Clients
             string? cacheKey = null;
             if (ShouldCache(definition))
             {
-                cacheKey = definition.FullUrl + definition + uriParameters?.ToFormData();
+                cacheKey = GetCacheKey(definition, uriParameters);
                 _logger.CheckingCache(cacheKey);
                 var cachedValue = _cache.Get(cacheKey, ClientOptions.CachingMaxAge);
                 if (cachedValue != null)
@@ -800,6 +800,13 @@ namespace CryptoExchange.Net.Clients
             && definition.Method == HttpMethod.Get
             && !definition.PreventCaching;
 
+        /// <summary>
+        /// Produce a unique cache key for the request based on the request definition and parameters.
+        /// </summary>
+        protected virtual string GetCacheKey(RequestDefinition definition, Parameters? parameters)
+        {
+            return definition.FullUrl + definition + parameters?.ToFormData();
+        }
 
         /// <inheritdoc />
         public virtual void SetOptions(UpdateOptions options)
@@ -889,6 +896,12 @@ namespace CryptoExchange.Net.Clients
 
             ApiCredentials = (TApiCredentials?)options.ApiCredentials?.Copy() ?? ApiCredentials;
         }
+
+        /// <inheritdoc />
+        protected override string GetCacheKey(RequestDefinition definition, Parameters? parameters)
+        {
+            return definition.FullUrl + definition + parameters?.ToFormData() + GetAuthenticationProvider()?.Key;
+        }
     }
 
     /// <inheritdoc />

CryptoExchange.Net/OrderBook/SymbolOrderBook.cs

@@ -289,6 +289,7 @@ namespace CryptoExchange.Net.OrderBook
             if (!startResult.Success)
             {
                 Status = OrderBookStatus.Disconnected;
+                _queueEvent.Set();
                 return CallResult.Fail(startResult.Error!);
             }
 

CryptoExchange.Net/Trackers/Klines/KlineTracker.cs

@@ -282,8 +282,8 @@ namespace CryptoExchange.Net.Trackers.Klines
                 KlineCount = klines.Count(),
                 FirstOpenTime = klines.First().OpenTime,
                 LastOpenTime = klines.Last().OpenTime,
-                HighPrice = klines.Select(d => d.LowPrice).Max(),
-                LowPrice = klines.Select(d => d.HighPrice).Min(),
+                HighPrice = klines.Select(d => d.HighPrice).Max(),
+                LowPrice = klines.Select(d => d.LowPrice).Min(),
 #pragma warning disable CS0618 // Type or member is obsolete | Temporary to maintain previous behavior
                 Volume = klines.Select(d => d.Volume).Sum(),
                 AverageVolume = Math.Round(klines.OrderByDescending(d => d.OpenTime).Skip(1).Select(d => d.Volume).DefaultIfEmpty().Average(), 8)