我更新，管理一些.NET程序集PowerShell脚本。剧本是为建立对.NET 2集写的，但是现在（与PowerShell的运行，该框架的版本相同）需要与.NET 4集工作，以及.NET 2集。

I am updating a PowerShell script that manages some .NET assemblies. The script was written for assemblies built against .NET 2 (the same version of the framework that PowerShell runs with), but now needs to work with .NET 4 assemblies as well as .NET 2 assemblies.

由于.NET 4的支持内置运行老版本的框架的应用程序，它似乎是最简单的办法是启动的PowerShell与.NET 4中运行时，当我需要对.NET 4集运行它。

Since .NET 4 supports running applications built against older versions of the framework, it seems like the simplest solution is to launch PowerShell with the .NET 4 runtime when I need to run it against .NET 4 assemblies.

我怎么能运行的PowerShell与.NET 4运行？

How can I run PowerShell with the .NET 4 runtime?

推荐答案

PowerShell的（发动机）运行.NET 4.0下的罚款。 PowerShell的（控制台主机和 ISE ）不这样做，仅仅是因为他们被编译老版本的。净。有一个注册表设置，将修改.NET框架加载系统范围，这将反过来让PowerShell来使用.NET 4.0类：

PowerShell (the engine) runs fine under .NET 4.0. PowerShell (the console host and the ISE) do not, simply because they were compiled against older versions of .NET. There's a registry setting that will change the .NET framework loaded systemwide, which will in turn allow PowerShell to use .NET 4.0 classes:

reg add hklmsoftwaremicrosoft.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1
reg add hklmsoftwarewow6432nodemicrosoft.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1

要只更新了ISE使用.NET 4.0，您可以更改配置（$ PSHome的 powershell_ise.exe.config）文件有一大块是这样的：

To update just the ISE to use .NET 4.0, you can change the configuration ($psHomepowershell_ise.exe.config) file to have a chunk like this:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <startup>
      <supportedRuntime version="v4.0.30319" />
    </startup>
</configuration>

您可以构建.NET 4.0应用程序调用使用PowerShell中的PowerShell的API（System.Management.Automation.PowerShell）就好了，但这些措施将有助于获取在现成的PowerShell主机到.NET 4.0下工作。

You can build .NET 4.0 applications that call PowerShell using the PowerShell API (System.Management.Automation.PowerShell) just fine, but these steps will help get the in-the-box PowerShell hosts to work under .NET 4.0.

删除，当你不需要他们的任何更多的注册表项。这些都是全机键和强行迁移所有的应用程序到.NET 4.0，使用.NET 2，甚至应用程序的.NET 3.5