C# ASP.NET custom aoColumns definition from server

bewmar

I'm trying to define aoColumns using ajax and a C# webmethod. I am treating it very similarly to how I am passing in server-side data, using a List data structure that I add rows of List to. My problem is that this results in a string like:

{\"aoColumns\":[[\"\\\"bVisible\\\": False\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"],[\"\\\"bVisible\\\": True\"]]}

Which is nearly correct, except that the column definitions are using square brackets instead of {}. How would I go about generating the correct JSON text? Any help is greatly appreciated!