Add-Font_ParameterSetName.ps1

process {
    switch ($PsCmdlet.ParameterSetName) {
      "Directory" {
        ForEach ($fontsFolder in $Path){
           $fontFiles = Get-ChildItem -Path $fontsFolder -File -Recurse -Include @("*.fon", "*.fnt", "*.ttf","*.ttc", "*.otf", "*.mmm", "*.pbf", "*.pfm")
        }
      }
      "File" {
        $fontFiles = Get-ChildItem -Path $FontFile -Include @("*.fon", "*.fnt", "*.ttf","*.ttc", "*.otf", "*.mmm", "*.pbf", "*.pfm")
      }
    }