Litedb: System.IO.FileSystem error

[Harmen70]

I get this error:
"Could not load file or assembly 'System.IO.FileSystem, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)"

Project: windows 10 UWP
Version: LiteDB 3.1.0

Code sample:
using (var db = new LiteDatabase(@"KeyValues.db"))
{
// Get customer collection
var keyValues = db.GetCollection("keyvalues");
///on the next line below the exception is thrown
var keyV = keyValues?.FindOne(kv => kv.Key.Equals(keyValue.Key, StringComparison.OrdinalIgnoreCase));
if (keyV == null)
{
//insert
keyValues.Insert(keyValue);
}
else
{
//update
keyValues.Update(keyValue);
}
keyValues.EnsureIndex(k => k.Key);

                return true;
            }

[xied75]

What does your project.json look like? I just quickly done a sample app with VS 2017 with LiteDB 3.10 and it works alright. Please provide more details.

[mbdavid]

Hi @xied75, can you post this tips to works in UWP? I can edit Wiki page about portable version

[xied75]

@mbdavid I didn't do anything special at all, just create a blank UWP app and nuget LiteDB v3.1 and that's it, I even copied your example as is and everything works fine.

e.g. This is the project.json

{
  "dependencies": {
    "Microsoft.NETCore.UniversalWindowsPlatform": "5.2.2",
    "LiteDB": "3.1.0"
  },
  "frameworks": {
    "uap10.0": {}
  },
  "runtimes": {
    "win10-arm": {},
    "win10-arm-aot": {},
    "win10-x86": {},
    "win10-x86-aot": {},
    "win10-x64": {},
    "win10-x64-aot": {}
  }
}

And this is the MainPage.xaml.cs

using System.IO;
using LiteDB;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace App1
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        static string ConnectionString = Path.Combine(ApplicationData.Current.LocalFolder.Path, "MyData.db");

        public MainPage()
        {
            InitializeComponent();
            Loaded += MainPage_Loaded;
        }

        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            // Open database (or create if doesn't exist)
            using (var db = new LiteDatabase(ConnectionString))
            {
                // Get customer collection
                var col = db.GetCollection<Customer>("customers");

                // Create your new customer instance
                var customer = new Customer
                {
                    Name = "John Doe",
                    Phones = new string[] { "8000-0000", "9000-0000" },
                    Age = 39,
                    IsActive = true
                };

                // Create unique index in Name field
                col.EnsureIndex(x => x.Name, true);

                // Insert new customer document (Id will be auto-incremented)
                col.Insert(customer);

                // Update a document inside a collection
                customer.Name = "Joana Doe";

                col.Update(customer);

                // Use LINQ to query documents (will create index in Age field)
                var results = col.Find(x => x.Age > 20);
            }
        }
    }
}

[linhnd]

It seems this lib requires "Microsoft.NETCore.UniversalWindowsPlatform": "5.2.2". Just update the NETCore via nuget and you'll see the magic

[JensSchadron]

@Harmen70 I'm closing this as it seems like your issue has been resolved. Feel free to re-open it, if you feel like this is still the case on newer versions.