Convert Array to JSON in C#

string[] stringArr = new String[2];
            stringArr[0] = "order_no";
            stringArr[1] = "Order_Details";
            string jsonResults = JsonConvert.SerializeObject(stringArr );

var EmpName= "Pranjal";
var Designation= "Software Engineer";

var Emp= new 
{   
    Name = EmpName, 
    Desg= Designation
};

var json = JsonConvert.SerializeObject(Emp);