Really basic

Question

I am new to C# and have been coding an application to learn the language, tools, etc. I have just begun working my way through printing with .NET and get an error message when I try to using the System.Drawing namespace:

The type or namespace name 'Drawing' does not exist in the class or namespace 'System' (are you missing an assembly reference?)

Here is the offending code - not much:

using System;
using System.Drawing;

I can access other System namespaces. I am confused.

thanks for any help,

tony