How can I concatenate first and last name in powershell - powershell

Question

FirstName,LastName,passcode,Title,Manager_Email
zack,Ased,breast<achievement?&childhood059,manager,zasdasdh#gmail.com
How can I make the Name zack Ased and the username zack.Ased , here is the code I tried
Import-Module ActiveDirectory
$ADUsers = Import-Csv C:\users.csv
foreach ($User in $ADUsers) {
$FirstName = $User.FirstName
$LastName = $User.LastName
$Name = $FirstName + " " + $LastName
$username = $FirstName.$LastName
$password = $User.passcode
$Title = $User.Title
$Manager_Email = $User.Manager_Email
New-ADUser -Name $Name -SamAccountName $username -AccountPassword (ConvertTo-secureString $password -AsPlainText -Force) -Title $Title -ChangePasswordAtLogon $true
Enable-AdAccount -Identity $username
}

Answer 1

using -join:
$FirstName = 'John'
$LastName = 'Smith'
$Name = $FirstName, $LastName -join " "
#the " " is the delimiter, you can input whatever you like, for example a dot:
$Name = $FirstName, $LastName -join "."
see more examples on https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_join
Another method is by putting it in a new string:
$Name = "$($FirstName).$($LastName)"
There are several other possible methods of doing this.