C#

// Holds the arguments for the StatusChanged event

public class StatusChangedEventArgs : EventArgs

{

    // The argument we're interested in is a message describing the event

    private string EventMsg;

 

    // Property for retrieving and setting the event message

    public string EventMessage

    {

        get

        {

            return EventMsg;

        }

        set

        {

            EventMsg = value;

        }

    }

 

    // Constructor for setting the event message

    public StatusChangedEventArgs(string strEventMsg)

    {

        EventMsg = strEventMsg;

    }

}

// This delegate is needed to specify the parameters we're passing with our event
public delegate void StatusChangedEventHandler(object sender, StatusChangedEventArgs e);

// This is called when we want to raise the StatusChanged event

public static void OnStatusChanged(StatusChangedEventArgs e)

{

    StatusChangedEventHandler statusHandler = StatusChanged;

    if (statusHandler != null)

    {

        // Invoke the delegate

        statusHandler(null, e);

    }

}

public class Employee1 
{
    public string Property1 { get; set; }
    public Employee1() {}
}

public class Employee2:Employee1 
{
    public string Property2 { get; set; }
    public Employee2():base() {}
}

public class Form1
{
    List<employee1> m_employees = new List<employee1>();

    private void Add()
    {
        m_employees.Add(new Employee1());
        m_employees.Add(new Employee2());
    }

    private bool IsType(object item, string typeName)
    {
        bool result = false;
        // Make sure the object isn't null AND that the string isn't null or empty.
        if (item != null && !string.IsNullOrEmpty(typeName))
        {
            // Get the type of the item being checked
            result = (item.GetType().Name == typeName);
        }
        return result;
    }
}

string[] listItems = new string[2];
if (IsType(obj, "Employee2"))
{
    listItems[0] = ((Employee2)obj).Property1;
    listItems[1] = ((Employee2)obj).Property2;
}
else
{
    listItems[0] = ((Employee1)obj).Property1;
    listItems[1] = "Not applicable";
}

string[] listItems = new string[2];

Type itemType = obj.GetType();
listItems[0] = (itemType)obj).Property1;
if (IsType(obj, "Employee2"))
{
    listItems[1] = ((itemType)obj).Property2;
}
else
{
    listItems[1] = "Not applicable";
}