diff --git a/source/NetCoreServer/UdpServer.cs b/source/NetCoreServer/UdpServer.cs
index 183b9ef..35198d7 100644
--- a/source/NetCoreServer/UdpServer.cs
+++ b/source/NetCoreServer/UdpServer.cs
@@ -934,7 +934,10 @@ protected virtual void Dispose(bool disposingManagedResources)
                 if (disposingManagedResources)
                 {
                     // Dispose managed resources here...
-                    Stop();
+                    if (IsStarted)
+                    {
+                        Stop();
+                    }
                 }
 
                 // Dispose unmanaged resources here...