Fix Dispose lock on GLPriceCache

MarketData/MarketDataLib/Cache/GLPriceCache.cs

@@ -15,6 +15,10 @@ namespace MarketData.Cache
     // -- Singleton ------------------------------------------------------------
     private static readonly object instanceLock = new object();
     private static GLPriceCache instance = null;
+    // -- Disposal -------------------------------------------------------------
+    private volatile bool disposed = false;
+
+    private int refreshInProgress = 0;    
 
     /// <summary>
     /// 
@@ -52,10 +56,6 @@ namespace MarketData.Cache
         // return int.TryParse(configured, out int parsed) && parsed > 0 ? parsed : @default;
     }
 
-    // -- Disposal -------------------------------------------------------------
-    private volatile bool disposed = false;
-    private int refreshInProgress = 0;
-
     // -- Constructor ----------------------------------------------------------
     private GLPriceCache()
     {
@@ -63,14 +63,17 @@ namespace MarketData.Cache
     }
 
     /// <summary>
-    ///  Dispoal
+    /// Dispose
     /// </summary>
     public void Dispose()
     {
-        Dispose(true);
-        GC.SuppressFinalize(this);
+      Dispose(true);
+      GC.SuppressFinalize(this);
     }
 
+    /// <summary>
+    /// Dispose
+    /// </summary>
     protected virtual void Dispose(bool disposing)
     {
       if (disposed) return;
@@ -78,21 +81,15 @@ namespace MarketData.Cache
 
       if (disposing)
       {
-        Timer timerToDispose;
+        Timer timerToDispose = null;
         lock (instanceLock)
         {
-          timerToDispose = refreshTimer;
-          refreshTimer = null;
-          instance = null;
+            timerToDispose = refreshTimer;
+            refreshTimer = null;
+            instance = null;
         }
-        // Block until any in-flight tick completes before disposing
-        using (ManualResetEventSlim waited = new ManualResetEventSlim(false))
-        {
-            if (timerToDispose != null)
-                timerToDispose.Dispose(waited.WaitHandle);
-            waited.Wait(TimeSpan.FromSeconds(10));
-        }
-
+        // Dispose timer immediately; no blocking wait
+        timerToDispose?.Dispose();
         MDTrace.WriteLine(LogLevel.DEBUG, "[GLPriceCache:Dispose] Disposed.");
       }
     }