XamarinForms.BaseUrl

BaseUrl_Android.cs

using System;
using Xamarin.Forms;
using App.Android;

[assembly: Dependency (typeof (BaseUrl_Android))]
namespace App.Android 
{
	public class BaseUrl_Android : IBaseUrl 
	{
		public string Get () 
		{
			return "file:///android_asset/";
		}
	}
}

BaseUrl_iOS.cs

using Xamarin.Forms;
using App.iOS;
using Foundation;

[assembly: Dependency (typeof (BaseUrl_iOS))]

namespace App.iOS 
{
	public class BaseUrl_iOS : IBaseUrl 
	{
		public string Get () 
		{
			return NSBundle.MainBundle.BundlePath;
		}
	}
}

BaseUrl_WinPhone.cs

using Xamarin.Forms;
using App.WinPhone;
using Windows.Storage;
using System.IO.IsolatedStorage;

[assembly: Dependency(typeof(BaseUrl_WinPhone))]

namespace App.WinPhone
{
    public class BaseUrl_WinPhone : IBaseUrl
    {
        public string Get()
        {
            //IsolatedStorageFile.GetUserStoreForApplication().
            return "";
        }
    }
}

IBaseUrl.cs

using Xamarin.Forms;

namespace App.WinPhone
{
    public interface IBaseUrl { string Get(); }
}

// how to use
// var url = DependencyService.Get<IBaseUrl>().Get();