Module = Class?

[worqy]

Hi. I have before used "module" in Visual Basic, and now when I'm starting out in C#, I can't find it. So does the "class" do the job of the module?.
And how do I use it.

I have tried to store a value in my class:

functions_class functions = new functions_class();
functions.Nano = textBox1.Text;

The string is called Nano...

Now when I try to pop it up:

public void printData()
        {
            MessageBox.Show("Nano: " + Nano);  
        }

I just get this message:

Nano:

Something I do wrong here?