String Manipulation in C#: deserialize JSON

Can I use a string function in C# to manipulate this string;

"[{\"param开发者_Go百科\":\"Update Payment\",\"value\":\"50.00\"}]"

I want to get at all times the string in position "Update Payment" as well as the value in "50.00"

Since this appear to be JSON why don't you use a JSON deserializer ? http://james.newtonking.com/pages/json-net.aspx for example.