Using Json.NET you can also deserialize a JSON object into a .NET generic dictionary
string s = @"{""Tbl_Name"":""[[A01],[A02],[ALR]]""}";
Dictionary<string, string> values = JsonConvert.DeserializeObject<Dictionary<string, string>>(s);
Console.WriteLine(values.Count);
Console.WriteLine(values["Tbl_Name"]);
I hope this would help you getting started