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

namespace TestArrays
{
    internal class Program
    {
        private static void Main()
        {
            var lsc = new List<SomeClass>();
            for(Int32 i = 0; i < 10; i++)
                lsc.Add(new SomeClass());

            lsc.ForEach(x => Console.WriteLine(x.GetSomeValue("StringField")));
        }
    }

    internal class SomeClass
    {
        public readonly Int32 IntField;
        public readonly String StringField;
        public readonly Double DoubleField;

        private static readonly Random Rand = new Random();

        public SomeClass()
        {

            this.IntField = Rand.Next(0, 50);
            this.DoubleField = Rand.NextDouble();

            var array = new Byte[this.IntField];
            Rand.NextBytes(array);
            this.StringField = Encoding.UTF8.GetString(array);
        }
    }

    internal static class SomeClassExtentions
    {
        public static String GetSomeValue(this SomeClass classInstance, String fieldName)
        {
            const BindingFlags flags = BindingFlags.Public | BindingFlags.Instance;

            FieldInfo fi = typeof(SomeClass).GetField(fieldName, flags);
            return fi != null ? fi.GetValue(classInstance).ToString() : null;
        }
    }
}