How to create dotnet variable instance with no Constructors

Hi,

I just started moving my automations to DotNet components.

If find no Constructors for the DotNet variable "MSXML.DOMDocument.'Microsoft.MSXML, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'".

How can I create instanve of my variable?

wher can I find the documentation about the constructors for all the DotNet componets?