convert string to array to write to document

I have a string that looks like this: str = "{ "number" : "1", "street" : "one"}, { "number" : "2", "street" : "two" }, { "number" : "3", "street" : "three" }, { "number" : "4", "street" : "four" }, ...etc }"; and I'm writing it to a document like so: var sw = new StreamWriter("mydoc.doc"); sw.Write(str); Is there a way I can convert the string into an array, before it gets written to the doc? So that it can fit into an excel sheet nicely?