Restore SQLServer Database using Powershell and SMO

RestoreSQLServerDBUsingSMOInPowershell.ps1

$ErrorActionPreference = "Stop"  
$assemblylist =   
"Microsoft.SqlServer.Management.Common",  
"Microsoft.SqlServer.Smo",  
"Microsoft.SqlServer.Dmf ",  
"Microsoft.SqlServer.Instapi ",  
"Microsoft.SqlServer.SqlWmiManagement ",  
"Microsoft.SqlServer.ConnectionInfo ",  
"Microsoft.SqlServer.SmoExtended ",  
"Microsoft.SqlServer.SqlTDiagM ",  
"Microsoft.SqlServer.SString ",  
"Microsoft.SqlServer.Management.RegisteredServers ",  
"Microsoft.SqlServer.Management.Sdk.Sfc ",  
"Microsoft.SqlServer.SqlEnum ",  
"Microsoft.SqlServer.RegSvrEnum ",  
"Microsoft.SqlServer.WmiEnum ",  
"Microsoft.SqlServer.ServiceBrokerEnum ",  
"Microsoft.SqlServer.ConnectionInfoExtended ",  
"Microsoft.SqlServer.Management.Collector ",  
"Microsoft.SqlServer.Management.CollectorEnum",  
"Microsoft.SqlServer.Management.Dac",  
"Microsoft.SqlServer.Management.DacEnum",  
"Microsoft.SqlServer.Management.Utility"  
  
foreach ($asm in $assemblylist)  
{  
    $asm = [Reflection.Assembly]::LoadWithPartialName($asm)
}

$bakDbName = "The_Database_Name"
$srv = New-Object("Microsoft.SqlServer.Management.Smo.Server") "."

if ($srv.Databases.Contains($bakDbName)){
    $srv.KillDatabase($bakDbName);
}

$res = New-Object("Microsoft.SqlServer.Management.Smo.Restore")
$srv.ConnectionContext.StatementTimeout = 0
$res.Devices.AddDevice($bak.FullName, [Microsoft.SqlServer.Management.Smo.DeviceType]::File)
$res.Database = $bakDbName
$res.Action = [Microsoft.SqlServer.Management.Smo.RestoreActionType]::Database
$res.ReplaceDatabase = $true
$fileList = $res.ReadFileList($srv)
$folder = Split-Path $bak.FullName -parent
$mdf = Join-Path $folder "TheMdfName.mdf"
$ldf = Join-Path $folder "TheLdfName.ldf"

$dataFile = New-Object("Microsoft.SqlServer.Management.Smo.RelocateFile") $fileList.Rows[0][0].ToString(), $mdf 
$logFile = New-Object("Microsoft.SqlServer.Management.Smo.RelocateFile") $fileList.Rows[1][0].ToString(),$ldf 

$res.RelocateFiles.Add($dataFile);
$res.RelocateFiles.Add($logFile);
$res.ContinueAfterError = $false
$res.SqlRestore($srv)