In VB.Net you can do something like the following without any issues... just ignore the fact that this is a pretty useless class :-)
Imports System Public
This is because VB.Net supports partial namespaces; C# does not.
With Visual Basic, System is imported by default and child namespaces are automatically resolved.
Read more in this article.
VB.Net vs C#, Round 2: Partial Namespaces