PowerShell script startup project with configfile and logfile

SomeScript1.bat

rem
rem you must run this script as admin

c:
cd C:\scripts

powershell Set-ExecutionPolicy Unrestricted
powershell Get-ExecutionPolicy
powershell .\'SomeScript1.ps1' .\'SomeScript1.xml'
powershell Set-ExecutionPolicy Restricted

pause

SomeScript1.ps1

#
# SomeScript1.ps1
# V2015-11-24
# Purpose: Scheleton for further content
#
# Args: 
# - Config file # e.g. C:\scripts\SomeScript1.xml

#region args -----------------------
param
(
	[string]$configFile
)
[int]$global:someNumber = 0
#endregion args -----------------------

#region funcs ------------------------------------
$logfilename = "SomeScript1.Log"
Remove-Item $logfilename -ErrorAction:SilentlyContinue

function Log-Msg(){
	param(
		[string]$LogMsg
	)
	$LogMsg = (Get-Date -Format "yyyy-MM-dd HH:mm:ss") + " " + $LogMsg + "`n`r"
	Write-Host $LogMsg
	Add-Content $logfilename $LogMsg
}

function Exit-IfFalse(){
	param
	(
		[bool]$Check,
		[string]$ErrorMsg
	)
	if(!$Check){
		Log-Msg $ErrorMsg
		Read-Host $ErrorMsg". Press enter to exit"
		break #Exit
	}
}#endregion funcs ------------------------------------

#region program ------------------------------------

Log-Msg ("Started " + $logfilename)
Log-Msg ("Working Directory: " + ($PWD).ToString())

#Load config file
Log-Msg ("Loading config file [" + $configFile + "]")
Exit-IfFalse ($configFile.length -gt 0) ("Missing config file")
[Bool]$okdir = Test-Path -Path:$configFile -pathType:Leaf
Exit-IfFalse $okdir ("Missing config file: " + $configFile)

#read from file
[xml]$cfgXml = Get-Content $configFile
[string]$envir = $cfgXml.root.envir
[bool]$someBoolData = [System.Convert]::ToBoolean($cfgXml.root.$envir.somebooldata)
[string]$someData = $cfgXml.root.$envir.somedata
[string]$strDate = $cfgXml.root.$envir.somedate #2008-03-25 00:00:00

#Use config data
Log-Msg ("Envir: " + $envir)
if (-not [System.String]::IsNullOrEmpty($someData)) 
{
	Log-Msg ("SomeData: " + $someData)
}
[int]$yyyy = $strDate.Substring(0,4)
[int]$mm = $strDate.Substring(5,2)
[int]$dd = $strDate.Substring(8,2)
[datetime]$someDate = New-Object System.DateTime -ArgumentList:$yyyy,$mm,$dd

#Do whatever else you like

#End program with pause and a message
Exit-IfFalse $false ("Ended " + $logfilename)

#endregion program ------------------------------------

SomeScript1.xml

<?xml version="1.0" encoding="utf-8"?>
<root>
  <envir>dev</envir>
  <dev>
    <somedata>ABC</somedata>
    <somedate>2008-03-25 00:00:00</somedate>
    <somebooldata>True</somebooldata>
    <someotherdata>123</someotherdata>
  </dev>
  <prod>
    <somedata>DEF</somedata>
    <somedate>2015-01-01 00:00:00</somedate>
    <somebooldata>False</somebooldata>
    <someotherdata>456</someotherdata>
  </prod>
</root>