Initialize or wrap the underlyingStream opened on the log file. This can be used to write file headers, or wrap the stream in another that adds buffering, compression, encryption, etc. The underlying file may or may not be empty when this method is called.

[SuppressMessageAttribute]
public virtual Stream OnFileOpened(
	Stream underlyingStream,
	Encoding encoding
)

<SuppressMessageAttribute> _
Public Overridable Function OnFileOpened ( _
	underlyingStream As Stream, _
	encoding As Encoding _
) As Stream

[SuppressMessageAttribute]
public:
virtual Stream^ OnFileOpened(
	Stream^ underlyingStream, 
	Encoding^ encoding
)