Way to access private members of an object from another object

Create a sample class which have private variables. See below Code.

public class Sample
{
      private int i;
      internal int j;
      protected int k;
      private static string str;
}

In other class, access Private variables via reflection.

class Program
{
    static void Main(string[] args)
    {
        Type t= typeof(Sample);
         //To access members of any class use MemberInfo class.
          MemberInfo[] mem = t.GetMembers();
          BindingFlags PB = BindingFlags.NonPublic | BindingFlags.Instance;
           //To access field of any class use FieldInfo class.
            FieldInfo[] f = t.GetFields(PB);
            foreach (FieldInfo m in f)
            {
                Console.WriteLine(m.Name);
    }
}

We need to use BindingFlags to search for the private member.

BindingFlags PB = BindingFlags.NonPublic | BindingFlags.Instance;

This line creates a BindingFlag which tells that search for NonPublic members. We must specify either BindingFlags.Instance or BindingFlags.Static in order to get a return.

If we use this Binding

BindingFlags PB = BindingFlags.NonPublic | BindingFlags.Instance;

We will not be able to access private static string str; as it is static. BindingFlags.Instance denotes to search for non-static field. We need to use BindingFlags.Static to find out static members.

This will give list of all the private fields (Static or non-static)

BindingFlags PB = BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;