Can't get working in WinForms

[spj-uk]

I get the following error when SynchronizeAsync called

var serverProvider = new SqlSyncProvider(serverConnectionString);

            // Second provider is using plain old Sql Server provider, relying on triggers and tracking tables to create the sync environment
            var clientProvider = new SqliteSyncProvider(clientConnectionString);


            // Tables involved in the sync process:
            var tables = new string[] {"table1", "table2", "table3" };
            MessageBox.Show("Start");

            // Creating an agent that will handle all the process
            var agent = new SyncAgent(clientProvider, serverProvider, tables);

            try
            {
                do
                {
                    // Launch the sync process
                    var s1 = await agent.SynchronizeAsync();
                    // Write results
                    Console.WriteLine(s1);
                    MessageBox.Show(s1.ToString());

                } while (Console.ReadKey().Key != ConsoleKey.Escape);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                MessageBox.Show(ex.InnerException.ToString());
            }

Could not load file or assembly 'SQLitePCLRaw.core, Version=2.0.4.976, Culture=neutral, PublicKeyToken=1488e028ca7ab535' or one of its dependencies. The system cannot find the file specified.