C# Datatable to Array of Array

Question

I am working on an Angular application. I want the data returned from datatable or dataset as array of array as shown in second ex of image. this format:

0: {eid: "e101", ename: "ravi", esal: 1000}
1: {eid: "e102", ename: "ram", esal: 2000}
2: {eid: "e103", ename: "rajesh", esal: 3000}

I tried using NewtonSoft Json but still not getting desired result. Please guide how to achieve desired result

 string jsonString = string.Empty;
            ds.Tables.Add(dt);
            jsonString = JsonConvert.SerializeObject(dt.AsEnumerable().Select(r => r.ItemArray));
            return jsonString;

or

string jsonString = string.Empty;
            ds.Tables.Add(dt);
            jsonString = JsonConvert.SerializeObject(dt);