Duplicate header fix

Author: Pavan

articles/service-fabric/service-fabric-reliable-services-exception-serialization.md

@@ -5,7 +5,7 @@ ms.topic: conceptual
 ms.date: 03/30/2022
 ms.custom: devx-track-csharp
 ---
-# Overview
+# Remoting Exception Serialization Overview
 BinaryFormatter based serialization is not secure and Microsoft strongly recommends not to use BinaryFormatter for data processing. More details on the security implications can be found [here](https://docs.microsoft.com/dotnet/standard/serialization/binaryformatter-security-guide).
 Service Fabric had been using BinaryFormatter for serializing Exceptions. Starting ServiceFabric v9.0, [Data Contract based serialization](https://docs.microsoft.com/dotnet/api/system.runtime.serialization.datacontractserializer?view=net-6.0) for remoting exceptions is made available as an opt-in feature. It is strongly recommended to opt for DataContract remoting exception serializationby following the below mentioned steps.