SolutionEvents インターフェイス

[GuidAttribute("BF8BBF37-5415-46A9-940D-594CAD9DEC26")]
public interface SolutionEvents : _SolutionEvents, 
	_dispSolutionEvents_Event

public class Connect : IDTExtensibility2
{
    private SolutionEvents _solnEvents;

    public void OnConnection(object application, ext_ConnectMode connectMode, object addInInst, ref Array custom)
    {
        _applicationObject = (DTE2)application;
        _addInInstance = (AddIn)addInInst;

        _solnEvents = _applicationObject.Events.SolutionEvents;

        _solutionBeforeClosingEventHandler = new _dispSolutionEvents_BeforeClosingEventHandler(this.SolutionBeforeClosing);
        _solnEvents.BeforeClosing += _solutionBeforeClosingEventHandler;
    }

    private _dispSolutionEvents_BeforeClosingEventHandler _solutionBeforeClosingEventHandler

    private void SolutionBeforeClosing()
    {
        System.Windows.Forms.MessageBox.Show("SolutionBeforeClosing");
    }
}