Adding a reference to UI assembly

I have added many "using" statements to Additional Namespace Imports such as

System
System.Collections.Generic
System.ComponentModel
System.Data
System.Drawing
System.Drawing.Drawing2D
System.Text
System.Windows.Forms
System.Windows.Forms.VisualStyles

But when I reference it I still show an error that the symbol is undefined (CS0234). For example

public class Form1 : System.Windows.Forms.Form

Hovering over "Form" that shows red gives me this error.

Ideas?

Thank you.

Comments

  • You also need to add a reference to System.Windows.Forms.dll.

    Press F4, add reference, choose System.Windows.Forms.

    If you have a paid edition, you don't need to explicitly add this reference - nor the namespaces above. Just click the smart tag that appears next to "Form", then choose the option to add the reference and namespace automatically.
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