Microsoft Enterprise Library Explained

Enterprise Library
Developer:	Microsoft and Community
Latest Release Version:	6.0.1304.0
Platform:	.NET Framework
Operating System:	Windows 8, Windows 7, Windows Server 2012, Windows Server 2008, and above
Genre:	Software Factory
Website:

The Microsoft Enterprise Library is a set of tools and programming libraries for the Microsoft .NET Framework. It provides APIs to facilitate proven practices in core areas of programming including data access, logging, exception handling and others. Enterprise Library is provided as pluggable binaries and source code, which can be freely used and customized by developers for their own purposes. It also ships with test cases and quickstarts.

Benefits

Improved productivity: Each of the Application Blocks provides several interfaces meant to satisfy common application concerns.
Configuration-driven design: Many technical decisions about the application behavior can be delayed until configuration time of the application. For instance, if an application does not properly handle an exception, instead of adding another exception handler to the code, an administrator can configure an additional exception handling policy.
Improved testability: Many application areas can be reconfigured to improve testing of the application in isolation.
It reduces the work load of the developer.

Application Blocks

Each application block addresses a specific cross-cutting concern and provides highly configurable features, which results in higher developer productivity. The Application Blocks in Enterprise Library are designed to be as agnostic as possible to the application architecture, for example the Logging Application Block may be used equally in a web, smart client or service-oriented application.

Microsoft have produced a number of other deliverables that leverage Enterprise Library Application Blocks,^[1] including the Web Service Software Factory and Smart Client Software Factory.

Utilities

In addition to the Application Blocks, the standard Microsoft distribution of the Enterprise Library includes:

Configuration console: to visually add an Application Block to an application's configuration.
Out-of-proc service for production logging.

Version history

There have been several versions of the Microsoft Enterprise Library:

Enterprise Library 6.0 (April 2013) - Current
Enterprise Library 5.0 Windows Azure Integration Pack (Dec 2011) - Current
Enterprise Library 5.0 Optional Update 1 (May 2011) - Current
Enterprise Library 5.0 Silverlight Integration Pack (May 2011) - Active
Enterprise Library 5.0 (April 2010) - Active
Enterprise Library 4.1 (October 2008) - Deprecated
Enterprise Library 4.0 (May 2008) - Deprecated
Enterprise Library 3.1 (May 2007) - Deprecated
Enterprise Library 3.0 (April 2007) - Deprecated
Enterprise Library 2.0 (January 2006) - Active/Retired
Enterprise Library 1.1 (June 2005) - Deprecated
Enterprise Library 1.0 (January 2005) - Deprecated

Unity 3.5 Portable Class Library Preview

Unity is the dependency injection component of Microsoft Enterprise Library, which grew out of the Dependency Injection Application Block. It later became a standalone library^[2] and continues to be maintained by the community. Version 3.5, released in April 2014,^[3] adds support for Xamarin.^[4]

Version 6.0

Microsoft Enterprise Library 6 was released in April 2013.^[5] New features include:

Semantic Logging Application Block (SLAB)
Simplifying the library all around
Generalized and updated Transient Fault Handling Application Block ("Topaz") to help increasing resiliency to errors
Registration by convention and other improvements in Unity
Support for Windows Store apps (Unity, Topaz)
Support for async logging in the Logging Application Block
Streamlined programmatic configuration of all blocks to facilitate fast start and ease of experimentation/use
Integrating with other technologies (ASP.NET MVC and ASP.NET Web API)

This release has also retired the following 3 blocks:

Caching Application Block
Cryptography Application Block
Security Application Block

Version 5.0

Microsoft Enterprise Library 5.0 was released in April 2010, announced by Grigori Melnik.^[6] New features include:

Architectural refactoring fully supporting Dependency injection
Simplification of the codebase
Container independence (ships with Unity but you can choose to use other DI containers)
Async database support
Data accessors
Fluent configuration interface support
Configuration schemas to enable IntelliSense
New configuration tool
Higher performing logging
Support for hierarchical configuration merge and redirects
Honoring validation attributes between VAB and System.ComponentModel.DataAnnotations
WPF validation
Clearer error messaging throughout
Side-by-side support
A la carte installer
Visual Studio 2008 and Visual Studio 2010 support
Bug fixes
Backwards compatibility with version 4.1

Version 5.0 Silverlight Integration Pack

A port of Microsoft Enterprise Library 5.0 to Silverlight. Released in May 2011,^[7] it includes the following blocks:

Caching Application Block
Validation Application Block
Logging Application Block
Exception Handling Application Block
Unity Application Block
Policy Injection Application Block

Version 5.0 Windows Azure Integration Pack

Released in December 2011^[8]

Unity 3.0

Released April 2013.^[9]

Unity 2.1

Original released in May 2011, with an update in August 2012.^[10]

Version 4.1

This release of Enterprise Library in October 2008^[11] is a service releases that includes the following:^[12]

Unity interception mechanism and integration of the Policy Injection Application Block with the Unity Application Block
Added support for generics in the Unity Application Block
Added support for arrays in the Unity Application Block
Performance improvements
Usability improvements to the configuration tool
Visual Studio 2008 Service Pack 1 support
Bug fixes

The Application Block Software Factory and the Strong Naming Guidance Package are not included in this release but are available as a separate download. Thus, there is no longer a dependency on Guidance Automation Extensions (GAX).

Version 4.0

This release of Enterprise Library in May 2008^[13] includes the following:

Integration with the Unity Application Block
Windows Management Instrumentation (WMI) 2.0 support and improved instrumentation
Performance improvements (particularly, in the Logging Application Block)
Pluggable Cache Managers
Visual Studio 2008 support
Bug fixes

Version 3.1

In May 2007, Enterprise Library 3.1 was released with minor enhancements to the Validation and Policy Injection Application Blocks.

Version 3.0

In April 2007, Enterprise Library 3.0 was released. It contains new Application Blocks, a new Application Block Software factory designed to simplify the development of new Application Blocks and extensions, and new features providing better integration with .NET Framework 3.0. The 3.0 release of Enterprise Library contains the following Application Blocks:

Caching
Data Access
Cryptography
Exception Handling
Logging
Policy Injection (new)
Security
Validation

Version 2.0

In January 2006, a new version of Enterprise Library was released that targeted .NET Framework 2.0. The most significant change in this release was that the Configuration Application Block was removed, and the blocks were updated to use .NET's improved System.Configuration capabilities. This release also included significant improvements to the Logging Application Block, and much of the Security Application Block was removed due to similar capabilities provided in .NET Framework 2.0. The .NET 2.0 release of Enterprise Library contained the following Application Blocks:

Caching
Data Access
Cryptography
Exception Handling
Logging
Security

Version 1.1

Two releases of Enterprise Library were released for .NET Framework 1.1. The first was released in January 2005, followed by a minor maintenance release in June 2005. The .NET 1.1 releases of Enterprise Library contained the following Application Blocks:

Caching
Configuration
Cryptography
Data Access
Exception Handling
Logging and Instrumentation
Security

Version 1.0

Future

Ron Jacobs, a Microsoft Evangelist, described the purpose of Enterprise Library as "filling in the gaps" of .NET development between releases of the framework. As the framework continues to advance, developers are demanding more productive development libraries.

At the same time, Microsoft platforms evolve and certain scenarios, initially addressed by the Enterprise Library, are now being supported by the platforms themselves. In this case, the patterns & practices team uses the graceful retirement process to deprecate some parts.^[14]

Microsoft continues to promote Enterprise Library for enterprise/line-of-business development, and even many Microsoft products as well as projects within Microsoft IT use it extensively.

Starting November 2013, Microsoft fully open-sourced Enterprise Library and all of its application blocks.^[15] They now accept community contributions. The latest releases of SLAB1.1 and Unity 3.5 are developed in close collaboration with the community.

In August 2015, Microsoft posted they were handing Unity Dependency Injection over to new owners (Pablo Cibraro and Pedro Wood) into a new GitHub repo.^[16] At the same time, the patterns & practices - Enterprise Library home web site on CodePlex,^[17] announced that the remainder of the application blocks will no longer be developed. However, the source will continue to be available.

External links

Notes and References

Web site: Microsoft patterns & practices . GitHub . Microsoft . 27 November 2020.
Web site: Tavares . Chris . Forward to Developer's Guide to Dependency Injection Using Unity . microsoft.com . 5 November 2013 . Microsoft Patterns & Practices . 27 November 2020.
Web site: Melnik . Grigori . Unity 3.5 RTW: Now with more Peace, Love, and Rock 'n' Roll . Microsoft Blog . 21 April 2014 . 27 November 2020.
Web site: Simplifying cross-platform development - Unity 3.5 Portable Class Library Preview . MSDN Blog . Microsoft . https://web.archive.org/web/20151126172950/http://blogs.msdn.com/b/agile/archive/2014/04/10/simplifying-cross-platform-development-unity-3-5-portable-class-library-preview.aspx . 26 Nov 2015 . dead.
Web site: Just released - Microsoft Enterprise Library 6 . microsoft.com . 25 April 2013 . 27 November 2020.
Web site: Melnik . Grigori . Microsoft Enterprise Library 5.0 Released! . Microsoft Blog . 20 April 2010 . 27 November 2020.
Web site: Melnik . Gregori . Silverlight Integration Pack for Microsoft Enterprise Library 5.0 released! . Microsoft Blog. 11 May 2011 .
Web site: Melnik . Grigori . Announcing the Enterprise Library Integration Pack for Windows Azure with Autoscaling, Transient Fault Handling and more . Microsoft Blog . 2 December 2011 . 27 November 2020.
Web site: Unity 3 . 14 March 2014 . Microsoft.
Web site: Unity 2.1 . 14 March 2014 . Microsoft.
Web site: Melnik . Grigori . Just Released: Microsoft Enterprise Library 4.1 and Unity 1.2 . 28 October 2008 . Microsoft Patterns & Practices . 27 November 2020.
Web site: About This Release of Enterprise Library . microsoft.com . 21 December 2010 . 27 November 2020.
Web site: Microsoft Enterprise Library 4.0 – May 2008 . 6 December 2013 . Microsoft Patterns & Practices . 27 November 2020.
Web site: Melnik . Grigori . On deprecation . Microsoft Blog . 8 April 2011 . 27 November 2020.
Web site: Melnik . Grigori . Microsoft Enterprise Library - Open Development Model . Microsoft Blog. 21 November 2013 .
Web site: The future of Unity. blogs.msdn.microsoft.com. 21 August 2015 . 2016-05-07.
Web site: patterns & practices – Enterprise Library. CodePlex. 2016-05-07. 2018-01-16. https://web.archive.org/web/20180116000510/http://entlib.codeplex.com/. dead.