Core refactoring (app doesn't work)

FoxTube.Core/Services/History.cs

@@ -0,0 +1,32 @@
+using Newtonsoft.Json;
+using System.Collections.Generic;
+using System.Linq;
+using Windows.Storage;
+
+namespace FoxTube.Services
+{
+	public static class History
+	{
+		static readonly ApplicationDataContainer storage = ApplicationData.Current.RoamingSettings;
+
+		public static string[] SearchHistory
+		{
+			get => JsonConvert.DeserializeObject<string[]>(storage.Values["SearchHistory"] as string) ?? new string[0];
+			private set => JsonConvert.SerializeObject(value);
+		}
+
+		public static void AddSearchHistoryEntry(string term)
+		{
+			List<string> history = SearchHistory.ToList();
+			history.Insert(0, term);
+
+			if (history.Count > 5)
+				history.RemoveRange(5, history.Count - 5);
+
+			SearchHistory = history.ToArray();
+		}
+
+		public static void ClearSearchHistory() =>
+			SearchHistory = new string[0];
+	}
+}