Check out example codes for "asp.net core 3.1: cast jObject to dictionary<string,string>". It will help you in understanding the concepts better.
Code Example 1
string json = @"{""key1"":""value1"",""key2"":""value2""}";
var values = JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
Learn ReactJs, React Native from akashmittal.com