Microsoft Windows NT 4.0 Guide Manual de usuario descargar pdf (Pagina 137)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 132

Side-by-side Deployments of .NET Framework 1.0 and 1.1

A key benefit of .NET Framework 1.1 in Windows Server 2003 is that different versions can be

installed side-by-side on a single computer. For example, version 1.0 and version 1.1 of the .NET

Framework can be installed on the same computer, enabling you to better support a variety of

application configuration scenarios. Support for side-by-side deployment benefits administrators

and developers alike by eliminating the hassles associated with maintaining the DLLs of old.

In the context of this guide, versions are defined as follows:

• A 1.0 application is an application built with and intended for .NET Framework 1.0. All Visual

Studio .NET 2002 applications are built this way.

• A 1.1 application is an application built with and intended for .NET Framework 1.1. All Visual

Studio .NET 2003 applications are built this way.

All versions of Windows Server 2003 ship with .NET Framework 1.1.

How Side-by-Side Versions Work

Side-by-side versions of the .NET Framework are supported in much the way that the Visual

Basic runtime works. With Visual Basic, a developer can build an application that targets the

Visual Basic 5.0 runtime and deploy it to a computer. Later, an application can be built that targets

the Visual Basic 6.0 runtime and deployed to the same computer. In the end, both versions 5.0

and 6.0 of the Visual Basic runtime are installed on the computer. However, an application

targeted for a particular version works only with the version they are compiled against—behavior

that differs from the runtime and the .NET Framework.

With the .NET Framework, an application can be built and compiled against version 1.0, and then

even if version 1.1 is installed on a computer, an administrator can redirect the application to use

version 1.1 of the runtime. A developer is not required to recompile the original application against

version 1.1. In a side-by-side installation of the .NET Framework, an application is redirected

dynamically to a newer version of the runtime and .NET Framework libraries without any

intervention from the developer.

Assemblies and Side-by-Side Execution

Side-by-side execution is the ability to store and run multiple versions of an application or

component on the same computer. This means that you can have multiple versions of the

runtime, and multiple versions of applications and components that use a version of the runtime,

on the same computer at the same time. Side-by-side execution gives you more control over the

versions of a component an application binds to and more control over the version of the runtime

an application uses.

Support for side-by-side storage and execution of different versions of the same assembly is an

integral part of strong naming and is built into the infrastructure of the runtime. Because the

strong-named assembly's version number is part of its identity, the runtime can store multiple

versions of the same assembly in the global assembly cache and load those assemblies at run

time.

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