title: Add or modify JSON string
body: <p>I'm curious as to whether or not you can add or modify an incoming JSON string in a console application. For example, I have a JSON string with firstname, lastname, and street with values in those fields. Is it possible to add to or modify those values assosciated to those fields from user input? </p>
  
  <p>EDIT: First, sorry, I should have been a lot more clear. So far I have converted the dataset/datatable from SQL database into a JSON string and can display the JSON string to the console. I have then converted the JSON string back to a dataset with a custom function "ConvertJSONToDataTable". In my SQL Database there is a table Applicant, with these fields: LastName, FirstName, Street, Title, State, ZIP, PhoneNumber. I'm really confused as to how to start this. Maybe I'm just overthinking it. I need to write out to the console "Enter First Name: " and then "Enter Last Name: ", etc, etc, and the value entered should change with the existing value in the datatable. This is what my teacher wants: <em>Try writing some code that implements adding and modifying based on an incoming JSON string</em></p>
  
  <p>Thanks in advance!</p>