Welcome to the Lounge

/// <summary>
/// Event to indicate Description
/// </summary>
public event EventHandler Name;
/// <summary>
/// Called to signal to subscribers that Description
/// </summary>
/// <param name="e"></param>
protected virtual void OnName(EventArgs e)
    {
    EventHandler eh = Name;
    if (eh != null)
        {
        eh(this, e);
        }
    }

public event EventHandler Name = delegate { };

protected virtual void OnName(EventArgs e)
{
    Name(this, e); // Name can never be null
}

public event EventHandler Name;

protected virtual void OnName(EventArgs e)
{
    Name?.Invoke(this, e);
}

private IMultipleComponentHandler SelectionHandler
{
    get
    {
        if (m_selectionHandler == null)
        {
            if (SelectedObject is IMultipleComponentHandler handler)
            {
                m_selectionHandler = handler;
            }

            else
            {
                object[] collection;
                
                if (SelectedObject is IEnumerable e
                    && !SelectedObject.GetAttributes<IgnoreIEnumerableAttribute>().Any())
                {
                    collection = e as object[] ?? e.Cast<object>().ToArray();
                }
                else if (SelectedObject != null)
                {
                    collection = new[] { SelectedObject };
                }
                else
                {
                    collection = Array.Empty<object>();
                }

                m_selectionHandler = new InspectorMultipleComponentHandler(collection);
            }
        }
        
        return m_selectionHandler;
    }
}
private IMultipleComponentHandler m_selectionHandler;

public IMultipleComponentHandler SelectionHandler
{
    get
    {
        if (m_selectionHandler == null)
        {
            m_selectionHandler = InitialiseSelectionHandler(SelectedObject);
        }
        return m_selectionHandler;
    }
}

private IMultipleComponentHandler InitialiseSelectionHandler(object selectedObject)
{
    if (selectedObject is IMultipleComponentHandler handler)
        return m_selectionHandler = handler;

    object[] collection;
    if (selectedObject is IEnumerable e
        && !selectedObject.GetAttributes<IgnoreIEnumerableAttribute>().Any())
    {
        collection = e as object[] ?? e.Cast<object>().ToArray();
    }
    else if (selectedObject != null)
    {
        collection = new[] { selectedObject };
    }
    else
    {
        collection = Array.Empty<object>();
    }
    return new InspectorMultipleComponentHandler(collection);
}

private IMultipleComponentHandler m_selectionHandler;

Chris Maunder wrote:

Who has a good survey question (and answer options!).

Marc Clifton wrote:

D: Air-dropped by the Code Project Air Force Rescue