What are the instance options with a second class?

Question

I asume that just in time compiler error messages are because arrays are not just a part of the VBdotNET
environment.
With the textfile containing content for a listbox, a textbox, a button and a label
without a form inheritens
i started to move in my frame the line with the streamreader object
to a second class file.

To avoid common errors i sued the bing browser with "vb dot net instanzen"
to search for hints reading the documentations
finding nothing that points out why instances like

    Public TrollArmy As New MyTextStringIntegration  

are lead to error messages and how to avoid them.

Crossreading some website contents i am aware that
files with inheritenses for common controls can be
instanciated in a form1 classfile.

Even i do not know why my crossrefernces are not
enough for me to manage the documentations.

VBdotNETfilecontent_form1class

VBdotNETfilecontent_second_of_two_classes_one_line_streamreader

Non native english user.