Cast array in Object variable to type in System.Type variable - vb.net

Question

I have this function:
Public Sub DoStuff(ByVal type as System.Type, ByVal value as Object)
End Sub
The 'value' argument is always an array of the same type as 'type'. How can I loop through the values of the array?
I'd like to be able to do something like this:
DoStuff(GetType(Integer), New Integer(){1,2,3})
Public Sub DoStuff(ByVal type as System.Type, ByVal value as Object)
//Strongly types arr as Integer()
Dim arr = SomeCast(type, value)
For Each i in arr
//Do something with i
Next
End Sub
Edit Ok, I think I'll add more details so you can see what I'm trying to do. I have an object that captures values coming back from another page. Once I have them captured, I want to loop through the 'Values' property. So DoStuff() above would be called for each dictionary object in 'Values'. If the value in the dictionary objct is an array I want to loop through it as well. I was saving the type added through the generic function call as a System.Type, but maybe that's not the way to go. How can I write this so I can save the type of the array and loop through the array later?
Public Class PopUpReturnValues
Implements IPopUpReturnValues
Public Sub AddValue(Of T As Structure)(ByVal name As String, ByVal value As T) Implements IPopUpReturnValues.AddValue
_values.Add(name, New PopUpReturnValue() With {.UnderlyingType = GetType(T), .Value = value, .IsArray = False})
End Sub
Public Sub AddArray(Of T As Structure)(ByVal name As String, ByVal values As T()) Implements IPopUpReturnValues.AddArray
_values.Add(name, New PopUpReturnValue() With {.UnderlyingType = GetType(T), .Value = values, .IsArray = True})
End Sub
Public Sub AddStringValue(ByVal name As String, ByVal value As String) Implements IPopUpReturnValues.AddStringValue
_values.Add(name, New PopUpReturnValue() With {.UnderlyingType = GetType(String), .Value = value, .IsArray = False})
End Sub
Public Sub AddStringArray(ByVal name As String, ByVal values As String()) Implements IPopUpReturnValues.AddStringArray
_values.Add(name, New PopUpReturnValue() With {.UnderlyingType = GetType(String), .Value = values, .IsArray = True})
End Sub
Private _values As New Dictionary(Of String, PopUpReturnValue)
Public ReadOnly Property Values() As IDictionary(Of String, PopUpReturnValue)
Get
Return _values
End Get
End Property
Public Class PopUpReturnValue
Public UnderlyingType As Type
Public Value As Object
Public IsArray As Boolean
End Class
End Class

Answer 1

Comments moved to answers per OP
Your "do something" code in based on the type I assume, String vs Int vs Apple, it would need to handle all three types with an If statement. Just include an overload for those three types, you don't actually need to pass the type information. However, if its just calling ToString() then just use an Object array.
And if you don't like overloads, just use the TypeOf operator to inspect the values of the array. When you throw an Integer into an Object array, its still an Integer, just a boxed one.

Answer 2

Is the type known at compile time? If so, perhaps you could use Generics.

Answer 3

You can provide an Action, like this:
Public Sub DoStuff(ByVal value As Array, ByVal process As Action(Of Object) )
For Each item In value
process(item)
Next item
End Sub
Then you just need a method that takes one parameter for each of the types you care about and knows how to cast object to that type. Then call DoStuff() passing in the address of that method. You could even use a lambda if you wanted.