Using -match with array of objects

using-match-array-of-objects.ps1

$Source = "txt","csv","pdf","xlsx","docx"
$Find = "csv","pdf"

$Source | ForEach-Object {
    
    # does not work
    # -match cannot find item in array
    If ($_ -match $Find)
    { 
        $_ 
    }  

    # works
    # creates (csv|pdf) join 
    If ($_ -match ($Find -join "|"))
    { 
        $_  
    }
}