How can I use PowerShell to delete all the files with a particular extension

Just run the command:

get-childitem rootdir -include *.extension -recurse | foreach ($_) {remove-item $_.fullname}

And that is it. Thanks Scripting Guy.

This is specially useful for me because very often, after I make changes in project reference in VS.NET some .dll files are left “out of sync” and and make parts your project act as if you did not re-compiled them. Sadly there is no easy way to tell VS.NET to get rid of all the .dll files that may be causing problems.

How to find files containing a string with Powershell

A while ago a wrote a small post to remind me of How to find files containing a string in Unix.

Now, I have learned how to do pretty much the same thing but with Powershell:

get-childitem {directory} –include {file pattern} -recurse | select-string -pattern "{string to Find}" -casesensitive

You can write a path in {directory} or nothing to use the current directory.