"Powershell 2 host programs that have been compiled with CLR 2"

hi, reading windows powershell system requirements , stumbled on following sentence:

"..."due change in runtime activation policy in microsoft .net framework 4.0, windows powershell host programs written windows powershell 2.0 and compiled common language runtime (clr) 2.0 cannot run without modification in windows powershell 3.0, compiled clr 4.0."

can explain me? powershell host programs?

thanks, rob

powershell hosts can run powershell commands; there's api out there allow developers write own hosts.  powershell.exe, ise, , powershell web access examples of hosts default.  (if remember correctly, there's separate host remoting well, wsmprovhost.exe)

if you're not writing own custom powershell hosts (or using 1 third-party vendor), blurb doesn't affect you.

edit:  maybe make more clear, powershell engine work of running powershell commands.  host presents user interface, whether it's console window, ise, or whatever, , handles making necessary calls powershell engine.  see http://msdn.microsoft.com/en-us/library/ee706563(v=vs.85).aspx more information on topic, if you're curious.

Windows Server  >  Windows PowerShell