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//C#3
public class Person
{
    public int ID {get; private set;}
    public string Name {get; set;}
    public int Age {get; set;}
 
    public Person(int id, string name, int age)
    {
       this.Id = id;
       this.Name = name;
       this.Age = age;
    }
}
//C# 1-2
public class Person
{
    private int _id;
    private string _name;
    private int _age;
 
    public int ID 
    {
        get { return _id; }
    }
 
    public string Name 
    {
      get { return _name; }
      set {_name = value; }
    }
 
    public int Age 
    {
      get { return _age; }
      set {_age = value; }
    }
 
    public Person(int id, string name, int age)
    {
       this._id = id;
       this._name = name;
       this._age = age;
    }
} |