Here Mudassar Ahmed Khan has explained with an example, how to use the Newtonsoft.Json.JsonConvert library for Serializing and Deserializing JSON using C# and VB.Net.
The JSON string will be first downloaded from an API using WebClient class and then will be deserialized to JSON object using the Deserialize function of the JSON.Net library.
Finally, the JSON object will be again serialized to JSON string using the Serialize function of the JSON.Net library in ASP.Net using C# and VB.Net.