app.cs

namespace myApp
{
    public partial class App : PrismApplication
    {
        static IApiService<IMyApi> myApi = new ApiService<IMyApi>(Config.ApiUrl);
        static IApiManager _apiManager;
        public App(IPlatformInitializer initializer = null) : base(initializer)
        {

        }

        protected override async void OnInitialized()
        {
            InitializeComponent();

        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            // Registering instances
            containerRegistry.RegisterInstance<IApiService<IMyApi>>(myApi);
            containerRegistry.RegisterInstance<IConnectivity>(CrossConnectivity.Current);
           
            // Registering types
            containerRegistry.RegisterSingleton<IApiManager, ApiManager>();

        }
      
    }
}