How can you tell V7 dgn files apart from V8?

Do you know how to use PowerShell? I wrote a PowerShell function that will give a file's magic number (https://en.wikipedia.org/wiki/Magic_number_(programming)#In_files) and if it recognizes the magic number the file type. It can recognize V7 and V8 files.

The function is on GitHub here: Get-MagicNumber on GitHub

Put that function in a file, then open PowerShell and do:

. filename.ps1

where the first character is period, then space, then the name of the ps1 file you put the function in.

Once you've done that you can cd to your folder of files and do the following:

dir *.dgn -recurse -file | Get-MagicNumber | Format-Table File,FileType

Where:
    -recurse means to get all *.dgn files in the current folder and sub-folders
    -file means only return info about files

You can also use the Export-Csv command instead of Format-Table to send the info to a CSV file instead of the screen.

can you explain this a bit  better  not good with poweshell

Kevin van Haaren said:

Put that function in a file, then open PowerShell and do:

. filename.ps1

can you explain this a bit  better  not good with poweshell

Kevin van Haaren said:

Put that function in a file, then open PowerShell and do:

. filename.ps1