Improved PictureStorage thread safety and more intuitive naming.

FileManager/PictureStorage.cs

@@ -34,12 +34,10 @@ namespace FileManager
 		private static string getPath(PictureDefinition def)
 			=> Path.Combine(ImagesDirectory, $"{def.PictureId}{def.Size}.jpg");
 
-		static Task backgroundDownloader;
-
 		static PictureStorage()
 		{
-			backgroundDownloader = new Task(BackgroundDownloader);
-			backgroundDownloader.Start();
+			new Task(BackgroundDownloader, TaskCreationOptions.LongRunning)
+			.Start();
 		}
 
 		public static event EventHandler<PictureCachedEventArgs> PictureCached;
@@ -48,6 +46,8 @@ namespace FileManager
 		private static Dictionary<PictureDefinition, byte[]> cache { get; } = new Dictionary<PictureDefinition, byte[]>();
 		private static Dictionary<PictureSize, byte[]> defaultImages { get; } = new Dictionary<PictureSize, byte[]>();
 		public static (bool isDefault, byte[] bytes) GetPicture(PictureDefinition def)
+		{
+			lock (cache)
 			{
 				if (cache.ContainsKey(def))
 					return (false, cache[def]);
@@ -63,8 +63,11 @@ namespace FileManager
 				DownloadQueue.Add(def);
 				return (true, getDefaultImage(def.Size));
 			}
+		}
 
 		public static byte[] GetPictureSynchronously(PictureDefinition def)
+		{
+			lock (cache)
 			{
 				if (!cache.ContainsKey(def) || cache[def] == null)
 				{
@@ -83,6 +86,7 @@ namespace FileManager
 				}
 				return cache[def];
 			}
+		}
 
 		public static void SetDefaultImage(PictureSize pictureSize, byte[] bytes)
 			=> defaultImages[pictureSize] = bytes;
@@ -100,6 +104,7 @@ namespace FileManager
 
 				var bytes = downloadBytes(def);
 				saveFile(def, bytes);
+				lock (cache)
 					cache[def] = bytes;
 
 				PictureCached?.Invoke(nameof(PictureStorage), new PictureCachedEventArgs { Definition = def, Picture = bytes });

LibationWinForms/GridEntry.cs

@@ -10,7 +10,7 @@ using System.Linq;
 
 namespace LibationWinForms
 {
-	internal class GridEntry : AsyncNotifyPropertyChanged, IObjectMemberComparable
+	internal class GridEntry : AsyncNotifyPropertyChanged, IMemberComparable
 	{
 		#region implementation properties
 		// hide from public fields from Data Source GUI with [Browsable(false)]

LibationWinForms/IMemberComparable.cs

@@ -3,7 +3,7 @@ using System.Collections;
 
 namespace LibationWinForms
 {
-	internal interface IObjectMemberComparable
+	internal interface IMemberComparable
 	{
 		IComparer GetMemberComparer(Type memberType);
 		object GetMemberValue(string memberName);

LibationWinForms/MemberComparer.cs

@@ -3,7 +3,7 @@ using System.ComponentModel;
 
 namespace LibationWinForms
 {
-	internal class ObjectMemberComparer<T> : IComparer<T> where T : IObjectMemberComparable
+	internal class MemberComparer<T> : IComparer<T> where T : IMemberComparable
 	{
 		public ListSortDirection Direction { get; set; } = ListSortDirection.Ascending;
 		public string PropertyName { get; set; }

LibationWinForms/SortableBindingList2[T].cs

@@ -5,7 +5,7 @@ using System.ComponentModel;
 
 namespace LibationWinForms
 {
-	internal class SortableBindingList2<T> : BindingList<T> where T : IObjectMemberComparable
+	internal class SortableBindingList2<T> : BindingList<T> where T : IMemberComparable
 	{
 		private bool isSorted;
 		private ListSortDirection listSortDirection;
@@ -14,7 +14,7 @@ namespace LibationWinForms
 		public SortableBindingList2() : base(new List<T>()) { }
 		public SortableBindingList2(IEnumerable<T> enumeration) : base(new List<T>(enumeration)) { }
 
-		private ObjectMemberComparer<T> Comparer { get; } = new();
+		private MemberComparer<T> Comparer { get; } = new();
 		protected override bool SupportsSortingCore => true;
 		protected override bool SupportsSearchingCore => true;
 		protected override bool IsSortedCore => isSorted;