Error by C#

Hi lsurya !!
You can take example(PMLNetExample) from Samples.zip, that is inside Everything3D2.1 and use it as a template for your assembly :) .
In your case I think you made console app instead of class lib and use public void Assign(PMLNetMain [COLOR=#ff0000]that[/COLOR]) .

i guess these .dll are old, Use latest file which comes from E3D.

In E3D lot of .dll are replaced or new as compare to PDMS