Set Field value

using System;//from ja  v  a2 s .  com
using System.Reflection;
using System.Windows.Forms; 

public class Class1
{
    static void Main( string[] args )
    {
      Type type = typeof(MyClass);
      object o = Activator.CreateInstance(type);
      
      type.InvokeMember("text", BindingFlags.SetField | BindingFlags.NonPublic | BindingFlags.Instance, null, o, new object[]{"C#"});
      string text = (string)type.InvokeMember("text", BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.Instance, null, o, new object[]{});
     
    }
    private static void OnChanged(object sender , System.EventArgs e)
    {
      Console.WriteLine(((MyClass)sender).Text);
    }
}
public class MyClass
{
  private string text;
  
  public string Text
  {
    get{ return text; }
    set
    { 
      text = value;
      OnChanged(); 
    }
  }
  
  private void OnChanged()
  {
    if( Changed != null )
      Changed(this, System.EventArgs.Empty); 
  }
  
  public event EventHandler Changed;
}