The type or namespace name 'Windows' does not exist in the namespace 'System'

Question

I am trying to code for pop up message box for displaying message for successful record insertion in C#.net

Error :

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

Code :

 global::System.Windows.Forms.MessageBox.Show("Test");

Answer 1

If you are using MS Visual Studio:

1. Right click on the Project
2. Select "Add Reference..."
3. Navigate to the ".NET" tab
4. Find "System.Windows.Forms" and select it
5. Click OK.

P. S.: Additionally, I had to do the same with "System.Drawing" for everything to work correctly in my first GUI Windows program.