using System;
using System.Collections.Generic;

namespace EmployeeApplication
{
    public class Employee
    {
        public int ID { get; private set; }

        public int No { get; private set; }

        public string Surname { get; private set; }

        public Employee( int id, string surname, int no )
        {
            this.ID = id;
            this.No = no;
            this.Surname = surname;
        }

        public override string ToString()
        {
            return String.Format( "{0} {1}", this.Surname, this.No );
        }
    }

    class Program
    {
        static void Main()
        {
            var employeeList = new List<Employee>( 2 );

            employeeList.Add( new Employee( 1, "Иванов", 232 ) );
            employeeList.Add( new Employee( 2, "Петров", 344 ) );

            var output = String.Join( ", ", employeeList );

            Console.WriteLine( "Employee list: {0}", output );
            Console.ReadKey();
        }
    }
}

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

namespace EmployeeApplication
{
    public class Employee
    {
        public int ID { get; private set; }

        public int No { get; private set; }

        public string Surname { get; private set; }

        public Employee( int id, string surname, int no )
        {
            this.ID = id;
            this.No = no;
            this.Surname = surname;
        }
    }

    class Program
    {
        static void Main()
        {
            var employeeList = new List<Employee>( 2 );

            employeeList.Add( new Employee( 1, "Иванов", 232 ) );
            employeeList.Add( new Employee( 2, "Петров", 344 ) );

            var output = new StringBuilder();

            foreach ( var employee in employeeList )
            {
                output.AppendFormat( "{0} {1}, ", employee.Surname, employee.No );
            }

            output.Length -= 2;

            Console.WriteLine( "Employee list: {0}", output );
            Console.ReadKey();
        }
    }
}