Imports System
Imports System.Collections.Generic
Public Class Test
Public Shared Sub Main()
Dim hset1 = New HashSet(Of Integer)({1, 2, 3, 4, 5})
Dim hset2 = New HashSet(Of Integer)({3, 4, 1})
Console.WriteLine("{0}", hset2.IsSubsetOf(hset1))
End Sub
End Class
' run:
'
' True
'