Check if Debug mode is running

The use case is the following. I have a flow that when run as debug must get it’s input from Inbox\dev folder and when run without debug must get the input from Inbox\client
The example below is from .NET

Public Class Form1

Private Sub Form1_Load(....)

#if DEBUG then
    <do something>
#else 
    <do something else>
#end if

End Sub

End Class