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EventLogTraceListener.TraceEvent Method (TraceEventCache, String, TraceEventType, Int32, String)

Writes trace information, a message, and event information to the event log.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

public override void TraceEvent(
	TraceEventCache eventCache,
	string source,
	TraceEventType severity,
	int id,
	string message


Type: System.Diagnostics.TraceEventCache
An object that contains the current process ID, thread ID, and stack trace information.
Type: System.String
A name used to identify the output; typically the name of the application that generated the trace event.
Type: System.Diagnostics.TraceEventType
One of the enumeration values that specifies the type of event that has caused the trace.
Type: System.Int32
A numeric identifier for the event. The combination of source and id uniquely identifies an event.
Type: System.String
The trace message.


source is not specified.


The log entry string exceeds 32,766 characters.

Important noteImportant

The TraceEvent methods are not intended to be called by application code. These methods are called by methods of the Debug, Trace, and TraceSource classes to write trace data.

The TraceEvent method is intended to trace events that can be processed automatically by tools. For example a monitoring tool can notify an administrator if a specific event is traced by a specific source.

The eventCache and source parameters are used to determine if the event should be traced. id is used to create an EventInstance object and the TraceEventType is equated to an EventLogEntryType for the EntryType property. The EventInstance is written to the event log with the message data using the WriteEvent method.


The maximum value of the id parameter is 65,535. If the id value specified is greater than 65,535, the maximum value is used.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.