PowerShell: Get list of unique vCenter Events

Get-UniqueVCEvents.ps1

#-----------------------------------------------------------------------------
# Import PowerCLI Module
#-----------------------------------------------------------------------------
Add-PSSnapin VMware.VimAutomation.Core

#-----------------------------------------------------------------------------
# Connect to vCenter Server
#-----------------------------------------------------------------------------
$Server = Read-Host 'Specify the vCenter Server or ESXi Host to connect to (IP or FQDN)?'
Connect-VMwareServer -VMServer $Server

#-----------------------------------------------------------------------------
# Get list of unique events over a period of time
#-----------------------------------------------------------------------------
$Events = Get-VIEvent -maxsamples 100000 -Start "01/08/2015" -Finish "05/08/2015"
$aResults = @()

ForEach($Item in $Events){
    $sEventType = $Item.GetType().Name
    If($aResults.Count -ge 1){
        If(!($aResults.Contains($sEventType))){
            $aResults += $sEventType
        }
    }Else{
        $aResults += $sEventType
    }
}
$aResults | Sort-Object