/// <summary>
		/// Event callback. Called when one of the nested project files is changed.
		/// </summary>
		/// <param name="sender">The FileChangeManager object.</param>
		/// <param name="e">Event args containing the file name that was updated.</param>
		private void OnNestedProjectFileChangedOnDisk(object sender, FileChangedOnDiskEventArgs e)
		{
			#region Pre-condition validation
			Debug.Assert(e != null, "No event args specified for the FileChangedOnDisk event");

			// We care only about time change for reload.
			if((e.FileChangeFlag & _VSFILECHANGEFLAGS.VSFILECHG_Time) == 0)
			{
				return;
			}

			// test if we actually have a document for this id.
			string moniker;
			this.GetMkDocument(e.ItemID, out moniker);
			Debug.Assert(NativeMethods.IsSamePath(moniker, e.FileName), " The file + " + e.FileName + " has changed but we could not retrieve the path for the item id associated to the path.");
			#endregion

			bool reload = true;
			if(!Utilities.IsInAutomationFunction(this.Site))
			{
				// Prompt to reload the nested project file. We use the moniker here since the filename from the event arg is canonicalized.
				string message = String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.QueryReloadNestedProject, CultureInfo.CurrentUICulture), moniker);
				string title = string.Empty;
				OLEMSGICON icon = OLEMSGICON.OLEMSGICON_INFO;
				OLEMSGBUTTON buttons = OLEMSGBUTTON.OLEMSGBUTTON_YESNO;
				OLEMSGDEFBUTTON defaultButton = OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST;
				reload = (VsShellUtilities.ShowMessageBox(this.Site, message, title, icon, buttons, defaultButton) == NativeMethods.IDYES);
			}

			if(reload)
			{
				// We have to use here the interface method call, since it might be that specialized project nodes like the project container item
				// is owerwriting the default functionality.
				this.ReloadItem(e.ItemID, 0);
			}
		}
		/// <summary>
		/// Event callback. Called when one of the assembly file is changed.
		/// </summary>
		/// <param name="sender">The FileChangeManager object.</param>
		/// <param name="e">Event args containing the file name that was updated.</param>
		private void OnAssemblyReferenceChangedOnDisk(object sender, FileChangedOnDiskEventArgs e)
		{
			Debug.Assert(e != null, "No event args specified for the FileChangedOnDisk event");

			// We only care about file deletes, so check for one before enumerating references.			
			if((e.FileChangeFlag & _VSFILECHANGEFLAGS.VSFILECHG_Del) == 0)
			{
				return;
			}


			if(NativeMethods.IsSamePath(e.FileName, this.assemblyPath))
			{
				this.OnInvalidateItems(this.Parent);
			}
		}