[raidicy]

I have this app called Search Everything[0]. Allows you to search everything on your PC (I use Win10).

The other option is using cmd prompt:

DIR C:\myfile.txt /S

No idea how with PowerShell

[0]https://www.voidtools.com/

[majkinetor]

Everything has CLI tool, es.exe, that you can use in shell.

But yeah, there is nothing better then Everything, on any OS.

[sharemywin]

findstr /spin /C:"class sample" *.cs

you can use this to look in files on windows