using System;

public class Program

{

    public static void Main()

    {

        var std = new Student() { StudentID = 1, 

                                      StudentName = "Bill", 

                                      Age = 20, 

                                      Address = "New York"   

                                    };

        std.StudentName = "TBA";

        Console.WriteLine(std.ToString());

    }

}

​

public class Student

{

    public int StudentID { get; set; }

    public string StudentName { get; set; }

    public int Age { get; set; }

    public string Address { get; set; }

​

}