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Configuring Targets and Tasks

You can configure MSBuild targets and tasks to run out-of-process with MSBuild so that you can target contexts that differ from the one you are running on. For example, you can target a 32-bit .NET Framework 2.0 application while the development computer is running on a 64-bit .NET Framework 4.5 operating system. You can also target computers that run with the .NET Framework 4 or earlier. The combination of 32- or 64-bitness and the specific .NET Framework version is known as the target context.

The .NET Framework 4.5 and 4.5.1 replace the common language runtime (CLR), targets, tasks, and tools of the .NET Framework 4 without renaming them. The .NET Framework 4.5.1 is installed as part Visual Studio 2013.

If you want to install MSBuild separately from Visual Studio, you can download the installation package from MSBuild Download. You must also install the .NET Framework versions you wish to use also.

MSBuild runs certain build tasks out of process to target a larger set of contexts. For example, a 32-bit MSBuild might run a build task in a 64-bit process to target a 64-bit computer. This is controlled by UsingTask arguments and Task parameters. The targets installed by the .NET Framework 4.5 set these arguments and parameters, and no changes are required to build applications for the various target contexts.

If you want to create your own target context, you must set these arguments and parameters appropriately. Look in the .NET Framework 4.5 Microsoft.Common.targets file and the Microsoft.Common.Tasks file for examples. For information about how to create a custom task that can work with multiple target contexts, or how to modify existing tasks, see How to: Configure Targets and Tasks.

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