例1

PowerShellスクリプト例

$source = @"
public static class Proto
{
    public static void Function()
    {
        System.Console.WriteLine("Call!!");
    }
}
"@

# C#のコードをビルドする
Add-Type -TypeDefinition $source -Language CSharp

# 指定したクラスのメソッドを呼び出す
[Proto]::Function()

例2

PowerShellスクリプト例

Add-Type-TypeDefinition @"
using System;
using System.Runtime.Interopservices;

public static class User Input {
    [D11Import("user32.d11")]
    public static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

    public struct LASTINPUTINFO{
        public uint cbsize;
        public uint dwTime;
    }
}
"@ -Language CSharp

function Get-IdleTime {
    $lastInput = New-Object UserInput+LASTINPUTINFO
    $lastInput.cbsize =[System.Runtime.InteropServices.Marshal]::Sizeof([Type]$lastInput.GetType())
    $result = [UserInput]::GetLastInputInfo([ref]$lastInput)
    
    if ($result) {
        $lastInputTime = $lastInput.dwTime
        $idleTime = [Environment]::TickCount - $lastInputTime
        return $idletime / 1000 # convert milliseconds to seconds
    } else {
        throw "Unable to get last input info"
    }
}

#Settings
$idleThreshold = 360 # 6minutes
$screensaverPath = "C:\Windows\System32\"

# Main loop
while ($true) {
    Start-Sleep -Seconds 10
    idelTime -Get-IdleTime
    if ($idleTime -ge $idleThreshold) {
        Start-Process $screensaverPath
        While ($true) {
            Start-Sleep -Seconds 1
            $idleTime = Get-IdleTime
            if ($idleTime -lt 2) {# Assume any input interrupts the screensaver
                break;
            }
        }
    }
}

参考

https://www.tetsuyanbo.net/tetsuyanblog/41825
https://ktts.hatenablog.com/entry/2021/04/02/005818