hi 

i have studied to make component for grasshopper.

so, I see grasshopper original component code to use reflector and 

make same component for example 'area'

copy reflector's code and paste this code to visual studio 2010.

but some error are occured. see under picture

some codes have problem. for example 'properties.get_area' or 'curve.get_isclosed' 

i think that this problem occured because I miss the typing 'import'.

in this code, i enter import list 

Imports Rhino

Imports Rhino.Geometry

Imports Rhino.Collections
Imports Grasshopper

Imports Grasshopper.Kernel

Imports Grasshopper.Kernel.Data

Imports Grasshopper.Kernel.Types
Imports GH_IO

Imports GH_IO.Serialization

if missed list, answer the another list.

thanks