How to use New-Object of a class present in a C# DLL using PowerShell

Question

I have a class in C# say for example

public class MyComputer : PSObject
{
    public string UserName
    {
        get { return userName; }
        set { userN         


        

Answer 1

First, make sure the assembly is loaded using

[System.Reflection.Assembly]::LoadFrom("C:\path-to\my\assembly.dll")

Next, use the fully qualified class name

$MyCompObj = New-Object My.Assembly.MyComputer

Answer 2

You don't need to have PSObject as base. Simply declare class without base.

Add-Type -typedef @"
public class MyComputer
{
    public string UserName
    {
        get { return _userName; }
        set { _userName = value; }
    }
    string _userName;

    public string DeviceName
    {
        get { return _deviceName; }
        set { _deviceName = value; }
    }
    string _deviceName;
}
"@

New-Object MyComputer | fl *

Later when you will work with the object, PowerShell will automatically wrap it into PsObject instance.

[3]: $a = New-Object MyComputer
[4]: $a -is [psobject]
True

Answer 3

Here is how it got working.

public class MyComputer
{
    public string UserName
    {
        get { return userName; }
        set { userName = value; }
    }
    private string userName;

    public string DeviceName
    {
        get { return deviceName; }
        set { deviceName = value; }
    }

    public string deviceName;
}

//PS C:\> $object = New-Object Namespace.ClassName
PS C:\> $object = New-Object Namespace.MyComputer
PS C:\> $object.UserName = "Shaj"
PS C:\> $object.DeviceName = "PowerShell"

Answer 4

Is the MyComputer class in a namespace? If so, you probably need to use the namespace-qualifed name of the class in the New-Object command.

Also, PowerShell does not like the public names DeviceName and deviceName which differ only in case. You probably meant to declare deviceName private. (But why not use auto-properties?)

Finally, stej is correct. There is no need to derive the MyComputer class from PSObject.