students(substring)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication11
{
    class Student
    {
        DateTime data;
        string name;

        public Student(string _name, System.DateTime _data)
        {
            name = _name;
            data = _data;
        }

        public string Name
        {
            get { return name; }
            set { value = name; }
        }

        public DateTime Data
        {
            get { return data; }
            set { value = data; }
        }

        public override string ToString()
        {
            return string.Format("{0} {1}", name, data.ToString());
        }
    }

    class MyList
    {
        Student[] M;
        int count;

        public MyList(ConsoleApplication11.Student[] st)
        {
            M = new Student[st.Length];
            M = st;
        }

        public int Count
        {
            get { return count; }
            set { value = count; }
        }

        public System.Collections.IEnumerable GetEnumerator()
        {
            for (int i = 0; i < count; i++)
                yield return M[i];
        }

        public static ConsoleApplication11.MyList addList(ConsoleApplication11.MyList obj1, ConsoleApplication11.MyList obj2)
        {
            Student[] rez = new Student[obj1.Count + obj2.Count];
            for (int i = 0; i < obj1.Count; i++)
                rez[i] = obj1.M[i];
            for (int i = 0; i < obj2.Count; i++)
                rez[i + obj1.Count] = obj2.M[i];
            return new MyList(rez);
        }

        public ConsoleApplication11.MyList ArrayFilter(string str)
        {
            Student[] rez = new Student[count];
            int k = 0;
            for (int i =0; i<count; i++)
            {
                for (int j =0; j < M[i].Name.Length - str.Length; i++)
                    if (M[i].Name.Substring(j, str.Length) == str)
                    {
                        rez[k] = M[i];
                        k++;
                    }
            }
            Student[] r = new Student[k];
            Array.Copy(rez, r, k);
            return new MyList(r);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {

        }
    }
}