Post x-www-form-urlencoded Data ApiController ASP.NET (Dot NET)

using DbFirstApproach.Models;
using System;
using System.Diagnostics;
using System.Linq;
using System.Web.Http;

namespace DbFirstApproach.Controllers
{
    public class AddStudentController : ApiController
    {
        [Route("api/addstudent")]
        [HttpPost]
        public string POST([FromBody]AddStudentModel studentInfo)
        {
            // get the largest id from db
            var db = new StudentEntities();
            var maxId = 0;
            try
            {
                maxId = db.Students.Max(item => item.Id);
            }
            catch (Exception) { }

            Student newStudent = new Student();
            newStudent.Course = studentInfo.course;
            newStudent.Name = studentInfo.name;
            newStudent.RollNumber = studentInfo.rollNumber;
            newStudent.Id = ++maxId;
            db.Students.Add(newStudent);

            // check the response of savechanges to confirm that the operation was successful
            if (db.SaveChanges() == 1)
                return $"{{Added : {{Id: {maxId}, Name : {studentInfo.name},  RollNumber : {studentInfo.rollNumber},  Course : {studentInfo.course} }} }}";

            return "An Error Occurred While adding data";
        }
    }
}

We have to create model (A simple class containing all the properties that will be received) for URL encoded data to store. The model used for above example is below:

namespace DbFirstApproach.Models
{
    public class AddStudentModel
    {
        public int rollNumber { get; set; }
        public string course { get; set; }
        public string name { get; set; }
    }
}