ASP.NET/VB: Remove rubbish when splitting array from string

In this example, the array contains rubbish:

yz[]=1&
yz[]=2&
yz[]=3&world

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I want the array to only contains this:

1
2
3

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<%@ Page Language="VB"%>
<%

Dim xyz As Array = "hello?xyz[]=1&xyz[]=2&xyz[]=3&world".split("xyz[]")

For index = 1 To xyz.GetUpperBound(0)
    HttpContext.Current.Response.Write(xyz(index))
    HttpContext.Current.Response.Write("<br>")
Next 

%>

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