How to parse a query string into a NameValueCollection in .NET

There’s a built-in .NET utility for this: HttpUtility.ParseQueryString

// C#
NameValueCollection qscoll = HttpUtility.ParseQueryString(querystring);

' VB.NET
Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(querystring)

You may need to replace querystring with new Uri(fullUrl).Query.