Update LibreHardwareMonitor

- Some nullability updates

StatusWindow/SensorEntry.cs

@@ -11,15 +11,14 @@ namespace HardwareMonitorStatusWindow.StatusWindow;
 
 public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
 {
-    private readonly DataErrorDictionary _dataErrorDictionary;
+    private readonly DataErrorDictionary _dataErrorDictionary = new();
 
     public SensorEntry()
     {
-        _dataErrorDictionary = new DataErrorDictionary();
         _dataErrorDictionary.ErrorsChanged += DataErrorDictionaryErrorsChanged;
     }
 
-    public string Label
+    public string? Label
     {
         get;
         set
@@ -31,7 +30,7 @@ public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
         }
     }
 
-    public string HardwareId
+    public string? HardwareId
     {
         get;
         set
@@ -41,7 +40,7 @@ public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
         }
     }
 
-    public string SensorId
+    public string? SensorId
     {
         get;
         set
@@ -52,7 +51,7 @@ public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
     }
 
     [JsonIgnore]
-    public Hardware? Hardware => Data.ComputerHardware.FirstOrDefault(h => h.Identifier.ToString() == HardwareId);
+    public Hardware? Hardware => Data.ComputerHardware?.FirstOrDefault(h => h.Identifier.ToString() == HardwareId);
 
     [JsonIgnore]
     public Sensor? Sensor => Hardware?.Sensors.FirstOrDefault(s => s.Identifier.ToString() == SensorId);
@@ -60,19 +59,22 @@ public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
     [JsonIgnore]
     public bool HasErrors => _dataErrorDictionary.Any();
 
-    public IEnumerable GetErrors(string propertyName)
+    public IEnumerable GetErrors(string? propertyName)
     {
-        return _dataErrorDictionary.GetErrors(propertyName);
+        if (string.IsNullOrWhiteSpace(propertyName))
+            throw new InvalidOperationException();
+
+        return _dataErrorDictionary.GetErrors(propertyName) ?? Enumerable.Empty<string>();
     }
 
-    public event EventHandler<DataErrorsChangedEventArgs> ErrorsChanged;
+    public event EventHandler<DataErrorsChangedEventArgs>? ErrorsChanged;
 
-    private void DataErrorDictionaryErrorsChanged(object sender, DataErrorsChangedEventArgs e)
+    private void DataErrorDictionaryErrorsChanged(object? sender, DataErrorsChangedEventArgs e)
     {
         ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(e.PropertyName));
     }
 
-    private bool ValidateLabel(string newValue)
+    private bool ValidateLabel(string? newValue)
     {
         _dataErrorDictionary.ClearErrors(nameof(Label));
 
@@ -84,14 +86,14 @@ public class SensorEntry : INotifyDataErrorInfo, INotifyPropertyChanged
         return false;
     }
 
-    public event PropertyChangedEventHandler PropertyChanged;
+    public event PropertyChangedEventHandler? PropertyChanged;
 
-    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+    protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
     {
         PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
     }
 
-    protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
+    protected bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
     {
         if (EqualityComparer<T>.Default.Equals(field, value)) return false;
         field = value;