Powershell Function: Show members of active directory group

This powershell creates a function called "Show-ADGroup" with two parameters to display the members of an AD group.

#
# Show-ADGroup - show members of an AD group, exports to out-grid or CSV on desktop.
#
# Parameters: 
#    Gname - name of AD group to show
#    ToFileYN - "Y" will show export list to CSV file; otherwise, display in Out-gridview
#
function Show-ADGroup
{
    param (
        [Parameter(Mandatory)] $Gname,
        [Parameter(Mandatory)] $TofileYN
        )

    # set $DCname to one of your local domain controllers
    $DCname = "your_DC_name"

    # counts number of members
    $cnt = (Get-ADGroup $Gname -Properties *).Member.Count
    Write-Host "# members: $cnt"

    # specify location of export to file; in this case the user's desktop
    $path = "C:\Users\$ENV:USERNAME\Desktop"
    $pathexist = Test-Path -Path $path

    If ($pathexist -eq $false)
        {New-Item -type directory -Path $path}

    $reportdate = Get-Date -Format ssddmmyyyy
    $csvreportfile = $path + "\ADGroupMembers_$reportdate.csv"

    if ($TofileYN -eq "Y") {
        Get-ADGroupMember -Identity "$Gname" -Server $DCname| 
        Select-Object @{Label = "Name";Expression = {$_.Name}}, 
                      @{Label = "SamAcctName";Expression = {$_.SamAccountName}},
                      @{Label = "distinguishedName";Expression = {$_.distinguishedName}} |
        Export-Csv -Path $csvreportfile -NoTypeInformation
    } else {
        Get-ADGroupMember -Identity "$Gname" -Server $DCname| 
        Select-Object @{Label = "Name";Expression = {$_.Name}}, 
                      @{Label = "SamAcctName";Expression = {$_.SamAccountName}},
                      @{Label = "distinguishedName";Expression = {$_.distinguishedName}} |
        Out-GridView
    }
}