PostSharp Diagnostics

The no-brainer instrumentation toolbox for .NET and .NET Core.

Add extensive logging to your application in minutes and direct it to any logging framework.
Get done in minutes, your way, faster than hand-written code.

Key Features

  • Add logging to thousands of methods within minutes.
  • Works with 10+ popular .NET logging frameworks.
  • Faster than hand-written code.
  • Measure execution time and get performance warnings.
  • Highly customizable.

Performance First

Faster than hand-written code – Code instrumented with PostSharp is typically faster than code instrumented by hand. We've benchmarked.

Enable/disable at run time – Logging can be turned on and off dynamically at run time using a simple API. When logging is disabled, the cost overhead is as low as 0 thanks to the JIT compiler optimizations.

GC-friendly – PostSharp does not allocate memory unless your logging framework requires it. For instance, with ETW, striclty no managed memory is allocated.

No impact on source code

  • Target thousands of methods with a single line of code.
  • Filter based on the name or namespace using wildcards or regular expressions.
  • Filter based on the type or method visibility or another qualifier.
  • Create more complex filters with System.Reflection.
  • Remove from release builds with #if DEBUG.
// Log all public methods of the Contoso.BusinessLayer namespace.
[assembly: Log(AttributePriority = 1, 
               AttributeTargetTypes = "Contoso.BusinessLayer.*"
               AttributeTargetMemberAttributes = MulticastAttributes.Protected | 
                       MulticastAttributes.Internal | MulticastAttributes.Public)]
// Exclude property getters.
[assembly: Log(AttributePriority = 2, AttributeExclude = true, 
               AttributeTargetMembers = "get_*" )]

// In DEBUG build, add logging to the registry API.                    
[assembly: Log( AttributePriority = 3, AttributeTargetAssemblies = "mscorlib"
                AttributeTargetTypes = "Microsoft.Win32.Registry*" )]

Super Detailed

You can choose to include the following pieces of data into your logs:

  • Full method and type name
  • Parameter name, type and value
  • this value
  • Execution time
  • Async state machine id
  • Field changes
  • Source code file name and line number
  • Works on any method – not just public ones

Highly Customizable

Parameter Formatters – Customize how parameter values are rendered, even with external types.

Enable/Disable Features – Most features can be enabled or disabled manually so you only get what you actually need. Don't need parameter names? No problem.

Override Anything – You can replace almost any formatting logic with your own.

Custom Logging Framework – You can build an adapter for any logging framework, including semantic ones.

Logging Frameworks

PostSharp provides out-of-the-box integration with the following products:

  • Log4Net
  • NLog
  • Common.Logging
  • Serilog
  • EventSource (ETW)
  • System.Diagnostics
  • Console.WriteLine
  • Microsoft.Extensions.Logging (.NET Core)
  • Enterprise Library
  • Application Insights
  • Loupe
  • Any other framework (custom back-end)
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