write-host differences in powershell ise and command prompt

I have a script that takes input from a csv file; then using the employee's ID number it extracts the employee's manager's name from AD.

Next I capture the manager's email address; which I believe is a string.  If I use the same command string in both PS ise and the command prompt I get to 2 different outputs; see below.

   using PS ise:  @{username@thecompany.com}
   command prompt:  username@thecompany.com

why is ise adding the "@{" and "}"

Here is a portion of the code:
Foreach($_ID in $_users) {
 $Name = $($_ID.EmpName)
 $EcomName = $($_ID.EcomName)
 $EmployeeID = $($_ID.EmpNumbr)
 if ($EmployeeID -ne $null) {
  $MgrInfo = Get-QADUser -LdapFilter "(EmployeeID=$EmployeeID)" -IncludedProperties EmployeeID | Select-Object Manager   # obtain employee's AD info using their Employee Number
  $Mgr = $MgrInfo -split("CN=")                                      # capture employee's manager name (CN string)
  $MgrName = $Mgr[1] -split(',')                                     # capture manager's name
  $MgrEmail = (Get-QADUser -Name $MgrName[0] | Select-Object Email)  # extract manager's email address by searching AD for -Name
  Write-Host $Name $EcomName $EmployeeID $MgrName[0] $MgrEmail
 }
}

El Bee