milcu

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;

namespace lab4
{
    class Persoana
    {
        private int index;
        private string Nume, Telefon, Adresa;
        private DateTime DataNasterii;
        private Categorie categorie;
        public Persoana(int ind,string num, DateTime datanas,string tel, string adr)
        {
            this.index = ind;
            this.Nume = num;
            this.DataNasterii = datanas;
            this.Telefon = tel;
            this.Adresa = adr;
        }
        public Persoana(int ind,string num, DateTime datanas,string tel,string adr, Categorie categorie) : this(ind,num, datanas,tel,adr)
        {
            this.categorie = categorie;
        }
       [Description("Numele complet al persoanei"), Category("Date personale")]
        public string Numee
        { get
            { return Nume; }
        }
        public DateTime Data
        {
            get { return DataNasterii; }

        }

        public string Telefonn
        {
            get { return Telefon; }
            set { Telefon = value; }
        }

        public string Adresaa
        {
            get { return Adresa; }
            set { Adresa = value; }
        }
        public Categorie Categoriee
        {
            get { return categorie; }
            set { categorie = value; }
        }
        [Description("Index"), Browsable(false)]
        public int Index
        {
            get { return index; }
        }
    }
    enum Categorie: int{
        Prieteni,
        Colegi,
        Rude,
        Diversi
        };
}


clasa FORM
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace lab4
{
    public partial class Form1 : Form
    {
        List<Persoana> pers = new List<Persoana>();
        Persoana p;
        string nume, telefon, adresa;
        DateTime datanasterii;
        Categorie categ;

        public Form1()
        {
            InitializeComponent();
            TreeNode parentNode = new TreeNode();
            parentNode.Name = "parinte_1";
            parentNode.Text = "Prieteni";
            treeView1.Nodes.Add(parentNode);

            TreeNode childNode = new TreeNode();
            childNode.Name = "child_1";
            childNode.Text = "Alexandru Andreescu";
            parentNode.Nodes.Add(childNode);

            TreeNode childNode1 = new TreeNode();
            childNode1.Name = "child_2";
            childNode1.Text = "Bogdan Barbu";
            parentNode.Nodes.Add(childNode1);

            TreeNode parentNode1 = new TreeNode();
            parentNode1.Name = "parinte_2";
            parentNode1.Text = "Colegi";
            treeView1.Nodes.Add(parentNode1);
            TreeNode parentNode2 = new TreeNode();
            parentNode2.Name = "parinte_3";
            parentNode2.Text = "Rude";
            treeView1.Nodes.Add(parentNode2);
            TreeNode parentNode3 = new TreeNode();
            parentNode3.Name = "parinte_4";
            parentNode3.Text = "Diversi";
            treeView1.Nodes.Add(parentNode3);
            foreach (Persoana p in pers)
            {
                //p - utilizat pentru parcurgerea elementelor
            }

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {

        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void propertyGrid1_Click(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            int index;
            if(comboBox1.SelectedItem=="Prieteni")
            {
                index = 1;
            }
            if(comboBox1.SelectedItem == "Colegi")
                { index = 2; }
            if(comboBox1.SelectedItem=="Rude")
            { index = 3; }
            if(comboBox1.SelectedItem=="Diversi")
            { index = 4; }
        }

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {

            Persoana p = new Persoana(1,textBox1.Text, Convert.ToDateTime(dateTimePicker1.Value), textBox2.Text, textBox3.Text, (Categorie)comboBox1.SelectedIndex);
            pers.Add(p);
            propertyGrid1.SelectedObject = p;
        }
    }
}