SignalsMVVM/SignalsMVVM/Models/SignalController.cs

using Microsoft.Win32;
using SignalsMVVM.HelperClasses;
using SignalsMVVM.Interfaces;
using System;
using System.Collections.Generic;
using System.IO;
using System.Windows;

namespace SignalsMVVM.Models
{
    public class SignalController : ISignalLoader, ISignalSaver
    {
        public IList<BaseSignal> LoadSignals()
        {
            OpenFileDialog dialog = new OpenFileDialog();
            IList<BaseSignal> signalList = new List<BaseSignal>();
            if (dialog.ShowDialog() == true) 
                try
                {
                    var byteArray = File.ReadAllBytes(dialog.FileName);
                    signalList = BinaryFormatterSerialization.DeserializeBinaryFormatter<IList<BaseSignal>>(byteArray);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            return signalList;
        }

        public void SaveSignals(IList<BaseSignal> signals)
        {
            SaveFileDialog dialog = new SaveFileDialog();
            if (dialog.ShowDialog() != true) return;
            try
            {
                File.WriteAllBytes(dialog.FileName,
                    BinaryFormatterSerialization.SerializeBinaryFormatter(signals));
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}