Here is the VB Translation i made:

Public Shared Function QueueUserWorkItem(Of T)(ByVal state As T, ByVal callback As Action(Of T)) As Boolean

Return ThreadPool.QueueUserWorkItem(Sub(o) callback(CType(o, T)), state)

End Function

Public Shared Function QueueUserWorkItem(Of T, U)(ByVal state As T, ByVal state2 As U, ByVal callback As Action(Of T, U)) As Boolean

Return ThreadPoolHelper.QueueUserWorkItem(New With {Key .Args1 = state, .Args2 = state2}, Sub(o) callback(o.Args1, o.Args2))

End Function

Hashtable temp1 = new Hashtable();
Hashtable temp2 = new Hashtable();

ThreadPool.QueueUserWorkItem(delegate{display(temp1,temp2);});

public void display(Hashtable t1,Hashtable t2){
//do something with t1,t2
}

It works for me and i am not sure if we have any pitfalls in the above approach.

Good work! I really loved this solution and can put it to good use in my work.

Thanks!