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Few days back I was looking into .NET Framework design. While playing with server controls I come across requirement where I need to invoke protected member of Object before doing some processing. I found one of the way to access non-public member of Class using reflection.

Here is sample working code

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

namespace Reflection
{
    public class A
    {
        private int m_nMember;
        public A()
        {
            m_nMember = 1;
        }
        protected int Member
        {
            get
            {
                return m_nMember;
            }
            set
            {
                m_nMember = value;
            }
        }

    }

    class Program
    {
        static void Main(string[] args)
        {
            A ObjectA = new A();
            Type type = typeof(A);
            PropertyInfo oPropertyInfo = type.GetProperty("Member", BindingFlags.Instance | //Specifies that instance members are to be included in the search.
                                                                    BindingFlags.NonPublic
                                                                );
            //Get Value of protected property
            Object propvalue = oPropertyInfo.GetValue(ObjectA, null);
            //Print value of property
            Console.WriteLine("Value of " + oPropertyInfo.Name + " = " + propvalue.ToString());

            //Set Value of protected property
            oPropertyInfo.SetValue(ObjectA, 2, null );

            //Again Get Value of protected property
            propvalue = oPropertyInfo.GetValue(ObjectA, null);

            //Print value of property
            Console.WriteLine("Value of " + oPropertyInfo.Name + " = " + propvalue.ToString());

            Console.ReadLine();
        }
    }
}