error when passing a reference to a derived object in a method

Question

In c# I am trying to implement a method which I can use to bind data to any control I pass to it (provided of course the control is derived from a databoundcontrol object)

Answer 1

Andrew Hare answered very well.

Your object must need something inside to use REF or OUT. For example: could be null.

DropDownList lister = new DropDownList();
lister = null;   
CTLBindData(ref lister);