Problem in creating rectangle

if anyone can help me?
I try to draw surface by a rectangle, but it comes as wireframe only. And when I make extrude, it make as walls as shown.


Plane command helps you create rectangular surface.
If you’re using ExtrudeCrv command you can activate Solid from commandLine options.

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Not sure what you are doing, or what you want.
For a rectangular surface try, _Plane.
To extrude your line rectangle try, _ExtrudeCrv
Extruding your rectangle with the Gumball dot will give the open structure you’re showing.

You drew a rectangular curve, not a surface. Rhino has both curves (which if straight are lines) and surfaces. They are different types of objects.

Excellent :+1:

Done, Thanks