Question

I have two following rows of code:

Microsoft.VisualBasic.Interaction.Beep()
or
Microsoft.VisualBasic.Beep()

The result is the same in this two rows.

what is Interaction class?And when shold i use it?

Thank you in advance.

Answer 1

Those two lines result in exactly the same code being generated. Which one you choose is a matter of style. Personally I would choose to simply use the Beep() command in the abscence of a namespace qualifier

Sub Main()
  Beep()
End Sub

Between the two choices you presented though I would choose Microsoft.VisualBasic.Interaction.Beep() over Microsoft.VisualBasic.Beep(). The former is the fully qualified name of the method and it’s completely unambiguous to the reader. The latter though is using a trick of VB.Net name resolution and one that would likely fool even the experienced VB.Net user.