PowerShell 4.0上运行PowerShell 2.0

当PowerShell 升级为4.0后，在高版本的PowerShell中怎样使用低版本的控制台？例如PowerShell 3.0 和PowerShell 2.0。

其实PowerShell.exe本身就具备了这个功能:

查看PowerShell 2.0的.NET 运行时

PS> powershell -Version 2.0 -Command "& { [environment]::Version }"

Major  Minor  Build  Revision
-----  -----  -----  --------
2      0      50727  7905

查看PowerShell 4.0的.NET 运行时

PS> powershell -Version 4.0 -Command "& { [environment]::Version }"

Major  Minor  Build  Revision
-----  -----  -----  --------
4      0      30319  34003

查看PowerShell 2.0 的命令条数

PS> powershell -Version 2.0 -Command "& { (get-command).count }"
410

查询PowerShell 4.0的命令条数

PS> powershell -Version 4.0 -Command "& { (get-command).count }"
1132

顺便验证下，高版本引入的PowerShell命令能在低版本上面运行不？答案是肯定的。

PS> powershell -Version 2.0 -Command "& { Invoke-WebRequest https://www.pstips.net }"
Invoke-WebRequest : The term 'Invoke-WebRequest' is not recognized as the name of a cmdlet, function, script file, or o
perable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try aga
in.
At line:1 char:22
+ & { Invoke-WebRequest <<<<  https://www.pstips.net }
    + CategoryInfo          : ObjectNotFound: (Invoke-WebRequest:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException