Array List with unique id while adding student info

Hello Frds,

I'm having arraylist to add student info but i have to create unique id per record below is my class.

Student objStudent=new Student(123,"Nj");
statArray.Add(objStudent)

public class Student
{
  private string name;
private int RollId;
public string Name
{

    get { return name; }
set { name = value; }

  }
public int Id
{
    get { return RollId; }
set { RollId = value; }
   }
public Employee(string name, int id)
{

    {
this.name=name;
this.Id=id;
}
}




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