How to call C# code in powershell

Powershell Command Add-Type

1. usage of
2. we use Add-Type -TypeDefinition $code. About C# Code, we should wrap it with a class.we put our sub class, struct,method,in this class.
3. Sample code

$Code = @'using System.Runtime.InteropServices;using System.Drawing;public class GetCursor{    public struct POINT    {        public int X;        public int Y;        public static implicit operator Point(POINT point)        {            return new Point(point.X, point.Y);        }    };    [DllImport("user32.dll")]    public static extern bool GetCursorPos(out POINT lpPoint);    public static Point GetCursorPosition()    {        POINT lpPoint;        GetCursorPos(out lpPoint);        return lpPoint;    }}'@

we call it in powershell

Add-Type -TypeDefinition $Code -ReferencedAssemblies System.Drawing

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we call Add-Type by using parameter -memberdefinition

1. if we use memberdefinition, parameter, we just expose the function to the powershell session, we don't need to create a class, powershell will auto generate a class for us. In this scenario, we usually, use this way to invoke native windows api. Detail info refer , Exapmle5, Here is a small code snip.

$CSharpCode=@"    [DllImport("user32.dll")]    public static extern bool BlockInput(bool fBlockIt);"@    $CS=Add-Type -MemberDefinition $CSharpCode -Name "KeyBoardMouse" -namespace win32Func -PassThru    $res = $CS:BlockInput($true)