Writing indented

MainWindow.xaml.cs

@@ -24,18 +24,18 @@ namespace CryptoCalc
     public partial class MainWindow : Window
     {
         private readonly Random rand = new();
+        private readonly JsonSerializerOptions jsonOptions = new();
 
         public MainWindow()
         {
             InitializeComponent();
-            
+            jsonOptions.WriteIndented = true;
         }
 
         private void saveButton_Click(object sender, RoutedEventArgs e)
         {
             Debug.WriteLine("asdf");
 
-
             var weatherForecast = new WeatherForecast
             {
                 Date = DateTime.Parse("2019-08-01"),
@@ -45,7 +45,7 @@ namespace CryptoCalc
             };
 
             string fileName = "asdf.json";
-            string jsonString = JsonSerializer.Serialize(weatherForecast);
+            string jsonString = JsonSerializer.Serialize(weatherForecast, jsonOptions);
             File.AppendAllText(fileName, jsonString);
 
             Debug.WriteLine(File.ReadAllText(fileName));