string json = @"{ 'name': 'John Smith', 'age': 30, 'city': 'New York' }"; JObject obj = JObject.Parse(json); string name = (string)obj["name"]; int age = (int)obj["age"]; string city = (string)obj["city"];
string json = @"{ 'name': 'John Smith', 'age': 30, 'city': 'New York' }"; JObject obj = JObject.Parse(json); obj["age"] = 31; obj["city"] = "San Francisco"; string newJson = obj.ToString();In this example, we modify the values of some properties in a JObject and then serialize it back to a JSON string using the ToString() method. The package library for Newtonsoft.Json is Newtonsoft.Json. It is available on NuGet, which is a package manager for .NET that allows developers to easily add and manage third-party packages in their projects.