$inISE = $psISE -ne $null

"Running in ISE: $inISE"

$name = $host.Name
$inISE = $name -eq 'Windows PowerShell ISE Host'

"Running in ISE: $inISE"

PowerShell
Copyright (C) 2016 Microsoft Corporation. All rights reserved.

PS C:\Users\tobwe\Downloads\PowerShell_6.0.0-alpha.15-win10-win2k16-x64> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      6.0.0-alpha
CLRVersion
WSManStackVersion              3.0
SerializationVersion           1.1.0.1
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion      2.3
GitCommitId                    v6.0.0-alpha.15
BuildVersion                   3.0.0.0
PSEdition                      Core


PS C:\Users\tobwe\Downloads\PowerShell_6.0.0-alpha.15-win10-win2k16-x64>

$path = "$home\Desktop\mycred.json"

$cred = Get-Credential
$cred |
  Select Username,@{n="Password"; e={$_.password | ConvertFrom-SecureString}} |
  ConvertTo-Json |
  Set-Content -Path $path -Encoding UTF8


notepad.exe $path

To later reuse the file and import the credential, use this:
$path = "$home\Desktop\mycred.json"

$o = Get-Content -Path $path -Encoding UTF8 -Raw | ConvertFrom-Json
$cred = New-Object -TypeName PSCredential $o.UserName,
  ($o.Password | ConvertTo-SecureString)

# if you entered a valid user credentials, this line
# will start Notepad using the credentials retrieved from
# the JSON file to prove that the credentials are
# working.
Start-Process notepad -Credential $cred

$path = "$home\Desktop\mycred.json"

$o = Get-Content -Path $path -Encoding UTF8 -Raw | ConvertFrom-Json
$cred = New-Object -TypeName PSCredential $o.UserName,
  ($o.Password | ConvertTo-SecureString)

# if you entered a valid user credentials, this line
# will start Notepad using the credentials retrieved from
# the JSON file to prove that the credentials are
# working.
Start-Process notepad -Credential $cred

PS C:\> Get-ExecutionPolicy -List

    Scope ExecutionPolicy
    ----- ---------------
MachinePolicy       Undefined
UserPolicy       Undefined
    Process       Undefined
CurrentUser    RemoteSigned
LocalMachine       Undefined

PS C:\> Get-ExecutionPolicy
Restricted

PS C:\> Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned -Force

PS C:\> Get-ExecutionPolicy
RemoteSigned

PS C:\>

#requires -Version 5.0
class TextToSpeech
{
  # store the initialized synthesizer here
  hidden static $synthesizer

  # static constructor, gets called whenever the type is initialized
  static TextToSpeech()
  {
    Add-Type -AssemblyName System.Speech
    [TextToSpeech]::Synthesizer = New-Object System.Speech.Synthesis.SpeechSynthesizer
  }

  # convert text to speech

  static Speak([string]$text)
  {
    [TextToSpeech]::Synthesizer.Speak($text)
  }
}

# since this class uses static constructors and methods, there is no need
# to instantiate an object
[TextToSpeech]::Speak('Hello World!')

#requires -Version 5.0
class TextToSpeech
{
  # store the initialized synthesizer here
  hidden $synthesizer

  # static constructor, gets called whenever the type is initialized
  TextToSpeech()
  {
    Add-Type -AssemblyName System.Speech
    $this.Synthesizer = New-Object System.Speech.Synthesis.SpeechSynthesizer
  }

  # convert text to speech

  Speak([string]$text)
  {
    $this.Synthesizer.Speak($text)
  }
}

$speaker = [TextToSpeech]::new()
$speaker.Speak('Hello World!')

#requires -Version 5.0
class Person
{
    [string]$FirstName
    [string]$LastName
    [int][ValidateRange(0,100)]$Age
    [DateTime]$Birthday

    # constructor
    Person([string]$FirstName, [string]$LastName, [DateTime]$Birthday)
    {
    # set object properties
    $this.FirstName = $FirstName
    $this.LastName = $LastName
    $this.Birthday = $Birthday
    # calculate person age
    $ticks = ((Get-Date) - $Birthday).Ticks
    $this.Age = (New-Object DateTime -ArgumentList $ticks).Year-1
    }
}

[Person]::new('Tobias','Weltner','2000-02-03')
[Person]::new('Frank','Peterson','1976-04-12')
[Person]::new('Helen','Stewards','1987-11-19')

FirstName LastName Age Birthday
--------- -------- --- --------
Tobias    Weltner   16 2/3/2000 12:00:00 AM
Frank     Peterson  40 4/12/1976 12:00:00 AM
Helen     Stewards  29 11/19/1987 12:00:00 AM

#requires -Version 5.0
class StopWatch
{
  # property is marked "hidden" because it is used internally only
  # it is not shown by IntelliSense
  hidden [DateTime]$LastDate = (Get-Date)

  # when no parameter is specified, do not emit verbose info

  [int] TimeElapsed()
  {
    return $this.TimeElapsedInternal($false)
  }

  # user can decide whether to emit verbose info or not
  [int] TimeElapsed([bool]$Verbose)
  {
    return $this.TimeElapsedInternal($Verbose)
  }

  # this method is called by all public methods

  hidden [int] TimeElapsedInternal([bool]$Verbose)
  {
    # get current date
    $now = Get-Date
    # and subtract last date, report back milliseconds
    $milliseconds =  ($now - $this.LastDate).TotalMilliseconds
    # use $this to access internal properties and methods
    # update the last date so that it now is the current date
    $this.LastDate = $now
    # output verbose information if requested
    if ($Verbose) {
      $VerbosePreference = 'Continue'
      Write-Verbose "Last step took $milliseconds ms." }
    # use "return" to define the return value
    return $milliseconds
  }

  Reset()
  {
    $this.LastDate = Get-Date
  }
}

# create instance
$stopWatch = [StopWatch]::new()

# do not output verbose info
$stopWatch.TimeElapsed()


Start-Sleep -Seconds 2
# output verbose info
$stopWatch.TimeElapsed($true)

$a = Get-Service
# output verbose info
$stopWatch.TimeElapsed($true)

0
VERBOSE: Last step took  2018.1879 ms.
2018
VERBOSE: Last step took  68.8883 ms.
69

#requires -Version 5.0
class StopWatch
{
  # property is marked "hidden" because it is used internally only
  # it is not shown by IntelliSense
  hidden [DateTime]$LastDate = (Get-Date)

  [int] TimeElapsed()
  {
    # get current date
    $now = Get-Date
    # and subtract last date, report back milliseconds
    $milliseconds =  ($now - $this.LastDate).TotalMilliseconds
    # use $this to access internal properties and methods
    # update the last date so that it now is the current date
    $this.LastDate = $now
    # use "return" to define the return value
    return $milliseconds
  }

  Reset()
  {
    $this.LastDate = Get-Date
  }
}

# create instance
$stopWatch = [StopWatch]::new()

$stopWatch.TimeElapsed()

Start-Sleep -Seconds 2
$stopWatch.TimeElapsed()

$a = Get-Service
$stopWatch.TimeElapsed()

0
2018
69