Access Object sender 's properties or object on an event.

Hi all,

I have a close window A event that get executed in window B as follow:

    void window_AClosed(object sender, FormClosedEventArgs e)
    {
    }

When I run this event in debug mode, i can see the object sender has an item from window A that  I like to use in window B.  So I looked at the expression of that object and I got the following:

 ((CAD_APP.CADScreens.frmCmdLog)(sender)).CmdLogFileDict

So after including the namespace and such I thought it will be easy as doing the following:

    void window_AClosed(object sender, FormClosedEventArgs e)
    {
       
      string n= ((CAD_APP.CADScreens.frmCmdLog)(sender)).CmdLogFileDict
    }


However, I keep getting syntax error because my sender object does not recognize that during compilation.  I am new to C# so after reading around I see the concept of "reflection" so my question is how can I access CmdLogFileDict, do I need to do something else or am I heading into the right direction by looking up on reflection?

Thank you,