public sealed class ThreadContext

Public NotInheritable Class ThreadContext

public ref class ThreadContext sealed

[<SealedAttribute>]
type ThreadContext =  class end

The ThreadContext type exposes the following members.

	Name	Description
	Properties	The thread properties map
	Stacks	The thread stacks

	Name	Description
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	ToString	Returns a String that represents the current Object. (Inherited from Object.)

The ThreadContext provides a location for thread specific debugging information to be stored. The ThreadContext properties override any GlobalContext properties with the same name.

The thread context has a properties map and a stack. The properties and stack can be included in the output of log messages. The PatternLayout supports selecting and outputting these properties.

The Thread Context provides a diagnostic context for the current thread. This is an instrument for distinguishing interleaved log output from different sources. Log output is typically interleaved when a server handles multiple clients near-simultaneously.

The Thread Context is managed on a per thread basis.

ThreadContext.Properties["user"] = userName;
log.Info("This log message has a ThreadContext Property called 'user'");

using(ThreadContext.Stacks["NDC"].Push("my context message"))
{
    log.Info("This log message has a ThreadContext Stack message that includes 'my context message'");

} // at the end of the using block the message is automatically popped

Reference