Adding a dynamic SoapHeader into a message

When designing a WCF ServiceContract, we can add custom SoapHeaders into the WCF service operation through the ServiceContract member statically. In addition to this, we can also programmatically create a custom SoapHeader and add it into a WCF request dynamically.

How to do it...

1. Create a custom SoapHeader instance.

   The first thing to do here is to generate an instance of the SoapHeader we want to add into the request message. WCF provides a built-in generic type called MessageHeader<T> for creating custom SoapHeaders containing different kinds of inner data properties. The following code snippet shows how we can generate a custom SoapHeader that contains some string data through the MessageHeader<T> type:

   MessageHeader<string> user = new MessageHeader<string>(Environment.UserName);
   
   MessageHeader userheader = user.GetUntypedHeader("ClientUser", "urn:test:calcservice");

2. Inject a custom SoapHeader object through OperationContext...