void AddItems(WixEntity[] items)
{
Shortcuts = items.OfType <FileShortcut>().ToArray();
Associations = items.OfType <FileAssociation>().ToArray();
IISVirtualDirs = items.OfType <IISVirtualDir>().ToArray();
ServiceInstaller = items.OfType <ServiceInstaller>().FirstOrDefault();
Permissions = items.OfType <FilePermission>().ToArray();
GenericItems = items.OfType <IGenericEntity>().Where(val => val.GetType() != typeof(ServiceInstaller)).ToArray();
FirewallExceptions = items.OfType <FirewallException>().ToArray();
var firstUnExpectedItem = items.Except(Shortcuts)
.Except(Associations)
.Except(IISVirtualDirs)
.Except(Permissions)
.Except(FirewallExceptions)
.Except(GenericItems.Cast <WixEntity>())
.Where(x => x != ServiceInstaller)
.ToArray();
if (firstUnExpectedItem.Any())
{
throw new ApplicationException("{0} is unexpected. Only {2}, {3}, {4}, {5}, {6} and {7} items can be added to {1}".FormatWith(
firstUnExpectedItem.First().GetType(),
this.GetType(),
typeof(FileShortcut),
typeof(FileAssociation),
typeof(ServiceInstaller),
typeof(FilePermission),
typeof(FirewallException),
typeof(IGenericEntity)));
}
}
