save and read in apparte klasse

ErgometerApplication/ErgometerApplication/DataSaving.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace ErgometerApplication
+{
+    class DataSaving
+    {
+        private List<Meting> ReadFile()
+        {
+            string path;
+            OpenFileDialog file = new OpenFileDialog();
+            file.Filter = "Ergometer files(*.ergo) | *.ergo | All files(*.*) | *.*";
+            if (file.ShowDialog() == DialogResult.OK)
+            {
+                path = file.FileName;
+                List<Meting> readFile = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Meting>>(System.IO.File.ReadAllText(path));
+                return readFile;
+            }
+            else
+            {
+                return null;
+            }
+        }
+        private List<Meting> SaveData(Meting meting, List<Meting> _data)
+        {
+            List<Meting> local_data;
+            local_data.Add(meting);
+
+            return _data;
+        }
+        private void WriteFile(List<Meting> _data)
+        {
+            string json = Newtonsoft.Json.JsonConvert.SerializeObject(_data);
+            string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "ErgometerSessionData.ergo");
+            System.IO.File.WriteAllText(path, json);
+            Console.WriteLine("Writing file: " + path);
+        }
+
+    }
+}