'Declaration
 
Public Shared Sub SetThreadContextValue( _
   ByVal key As String, _
   ByVal value As String _
) 

public static void SetThreadContextValue( 
   string key,
   string value
)

Parameters

key

The key or name to use for this variable.

value

The current value to assign to this variable for this thread.

This variable allows you to add contextual information to your log entries (like the session ID or username of the currently logged-in user, etc. This applies only when using manual configuration of LogManager through configuration file. In the <layout> section of an appender, you can add the value of a thread context variable using the following syntax:

[%X{user} %X{session}]

You can then set two thread context values for key "user" and key "session" and they will print out in the log file.

For more information on configuring LogManager and defining appenders and layouts, please consult the user guide for your application.

Reference

LogManager Class
LogManager Members