| SIPHeaderModifier Methods | 
The SIPHeaderModifier type exposes the following members.
| Name | Description | |
|---|---|---|
| AddIncomingModifier | 
            Adds an object that will modify the content of the incoming messages.
              (Inherited from AbstractMessageModifier.) | |
| AddOutgoingModifier | 
            Adds an object that will modify the content of the outgoing messages.
              (Inherited from AbstractMessageModifier.) | |
| ChangeHeaderValue | (Inherited from AbstractMessageModifier.) | |
| ModifyIncomingMessage | ||
| ModifyOutgoingMessage | ||
| PrepareAdditionalHeaders |