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Documentation

Examples

• Getting Started
• Logging Primer
  • Hello Logging
  • Service Trace Viewer
  • Windows Event Log
  • Hello Color

Trace Listeners

The following trace listeners are provided by the Essential.Diagnostics extensions.

Essential.Diagnostics namespace

Class	Description
BufferedEmailTraceListener	Writes trace events to an Email message sent at the end of the host process.
ColoredConsoleTraceListener	Writes formatted trace events to the console in color based on the type.
EmailTraceListener	Writes trace events to Email messages sent asynchronously.
InMemoryTraceListener	Writes traces to an in-memory array.
RollingFileTraceListener	Trace listener that writes formatted messages to a text file, rolling to a new file based on a filename template (usually including the date).
RollingXmlTraceListener	Trace listener that writes E2ETraceEvent XML fragments to a text file, rolling to a new file based on a filename template (usually including the date).
SeqTraceListener	Writes trace information to a Seq logging server.
SqlDatabaseTraceListener	Writes trace information to a SQL database.

Essential.Diagnostics.Fluent

Contains the scope utility classes, abstractions, and templated classes for easy use with dependency injection. This package makes using System.Diagnotics trace sources easier, and can be used either separately (with system trace listeners), or in conjunction with the extended trace listeners above.

Essential.Diagnostics namespace

Class	Description
ActivityScope	Sets the correlation ActivityId for the life of the scope object, performs a transfer, and logs activity messages.
LogicalOperationScope	Sets the correlation LogicalOperation stack for the life of the scope object.

Essential.Diagnostics.Abstractions namespace

Class	Description
AssemblyTraceLog<TEventId, TTarget>	Implementation of the fluent log interface that is bound to a specific EventId type and with a source named after the target class assembly.
AssemblyTraceSource<TTarget>	Enable applications to trace the execution of code and associate trace messages with a source named after the assembly the generic type is from.
GenericEventId	General event IDs.
GenericTraceLog	Implementation of TraceLog<TEventId> bound to GenericEventId.
ITraceLog<TEventId>	Fluent log interface, with strongly typed event IDs.
ITraceSource	Defines a set of methods and properties that enable applications to trace the execution of code and associate trace messages with their source.
ITraceSource<TTarget>	Defines a set of methods and properties that enable applications to trace the execution of code and associate trace messages with a source related to a specific class.
TraceLog<TEventId>	Generic implementation of the fluent log interface.
TraceSourceWrapper	Provides a wrapper around TraceSource that implements the ITraceSource interface, enable applications to trace the execution of code and associate trace messages with their source in a decoupled manner.

Essential.Diagnostics.Core

Core library with base classes, referenced by other packages.

Essential.Diagnostics namespace

Class	Description
ExpressionFilter	Filter events based on an expression.
TraceConfigurationMonitor	Monitors the config file for changes are refreshes trace listeners when required.
TraceFormatter	Inserts trace information into a provided template string. Used to provide the advanced formatting for several listeners.
TraceListenerBase	Extended trace listener designed to be subclassed with as little as a single template method override.

.NET Framework classes

From the Microsoft .NET Framework.

System.Diagnostics namespace

Class	Description
EventTypeFilter	Filters based on the level of the TraceEventType, e.g. Warning, Error, etc.
TraceFilter	Base trace filter class provided by the .NET framework.
TraceListener	Base trace listener class provided by the .NET framework.

System Trace Listeners

Class	Description
ConsoleTraceListener	Writes trace events to the console
DefaultTraceListener
DelimitedListTraceListener	Writes trace events to a file as a delimited list.
DiagnosticMonitorTraceListener	Part of Microsoft.WindowsAzure.Diagnostics; writes traces to Azure logs
EventLogTraceListener	Writes trace events to the Windows Event Log
EventProviderTraceListener
EventSchemaTraceListener
TextWriterTraceListener	Writes trace events to a simple file. Recommended you at least use FileLogTraceListener instead.
WebPageTraceListener	Forwards trace events to the ASP.NET trace output.
WMITraceListener^^1^^
XmlWriterTraceListener	Writes events in XML format, suitable for import into the Service Trace Viewer utility.

Microsoft.VisualBasic.Logging namespace

Class	Description
FileLogTraceListener	Writes trace events to a file with advanced options for file rotation and output format.

Enterprise Library Logging Application Block

Class	Description
FlatFileTraceListener
FormattedEventLogTraceListener

Note: These trace listeners from the Enterprise Library Logging Application Block can also be used directly with System.Diagnostics (for details see http://msdn.microsoft.com/en-us/library/ff664735%28v=PandP.50%29.aspx).

Guidance

Guidance on considerations when implementing logging and other instrumentation for your project:

• Logging Levels
• Theory of Event Ids
• Correlation
• Integration
• Comparison of logging frameworks

Guidance related to the Essential.Diagnostics project:

• Design guidelines for TraceListener extensions