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Dim serializer as New JavaScriptSerializer()
Dim arrayJson as String = serializer.Serialize(myArray)

You are going to want to look into JSON serialization. Here is a good article that explains one way to do it (unfortunately the examples are in C#) but with more information we can probalby steer you towards the right toolkit.

There are four ways:

  1. Roll your own with a Custom formatter
  2. Json.NET.
  3. JavaScriptSerializer
  4. DataContractJsonSerializer

I recently blogged about how to do Json Serialization.

you could try the javascript serializer ( I believe it was deprecated for a while by Microsoft but then un-deprecated (is that a word??) when they wanted to use it in MVC