using (var inst = new AssemblyInstaller(typeof(MyNamespace.Program).Assembly, new string[] { })) {
    IDictionary state = new Hashtable();
    inst.UseNewContext = true;
    try {
    if (uninstall) {
        inst.Uninstall(state);
    } else {
        inst.Install(state);
        inst.Commit(state);
    }
    } catch {
    try {
        inst.Rollback(state);
    } catch { }
    throw;
    }
}

using (var sc = new ServiceController("the service's name"))
{
    sc.Start();
    sc.WaitForStatus(ServiceControllerStatus.Running, TimeSpan.FromSeconds(20));
}

ServiceInstaller