[MonoDevelop] How to add to Toolbox

[George Lober]

Hello List,

I have a newbie question. I want to add other widgets to the MonoDevelop 
toolbox. I am running MonoDevelop in Linux. I need a graph component, so 
I have tried adding NPlot as well as  ZedGraph,  not being successful 
with either one. I assume one is supposed to click on the plus icon in 
the toolbox header and select the new widget .dll. When I do this, I 
don't see any new icons in the toolbox window. What am I doing wrong?

Thanks,
George