Bug fixes

Utils/DataSerialization.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Text.Json;
 using GazpromApp.Models;
 
@@ -8,12 +9,26 @@ public static class DataSerialization
 {
     private static void SaveData(string path, string data)
     {
-        System.IO.File.WriteAllText(path, data);
+        if (!File.Exists(path))
+        {
+            File.WriteAllText(path, data);
+            return;
+        }
+
+        var dir = Path.GetDirectoryName(path) ?? "";
+        var fileName = Path.GetFileNameWithoutExtension(path);
+        var ext = Path.GetExtension(path);
+        var index = 1;
+    
+        while (File.Exists(Path.Combine(dir, $"{fileName} ({index}){ext}")))
+            index++;
+        
+        File.WriteAllText(Path.Combine(dir, $"{fileName} ({index}){ext}"), data);
     }
 
     private static string LoadData(string path)
     {
-        var text = System.IO.File.ReadAllText(path);
+        var text = File.ReadAllText(path);
         return text;
     }