create batch file for checking .net framework 3.5 sp1 is installed or not

I want to know how to create batch开发者_如何学C file for check .net framework 3.5 sp1 is installed or not in system.

Please Help.

You can check if the folder %systemroot%\Microsoft.NET\Framework\v3.5 exists.

In your batch file, it could looks like:

IF EXIST "%systemroot%\Microsoft.NET\Framework\v3.5" ECHO File exists!

And here is a list of other possibilites: http://www.walkernews.net/2008/05/16/how-to-check-net-framework-version-installed/