public void Execute()
{
if (!_app.IsStaged)
{
throw new InvalidOperationException("Application isn't staged. Can't install.");
}
bool firstInstall = !_app.IsInstalled;
if (firstInstall)
{
_hookExecutor.ExecuteFirstInstall();
}
_hookExecutor.ExecutePreInstall();
_app.BackupAndInstall();
_hookExecutor.ExecutePostInstall();
if (firstInstall)
{
_hookExecutor.ExecuteFirstPostInstall();
}
}