rework scheduled tasks in preparation of common project going portable

MediaBrowser.Controller/Extensions/BaseExtensions.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using MediaBrowser.Model.Cryptography;
+
+namespace MediaBrowser.Controller.Extensions
+{
+    /// <summary>
+    /// Class BaseExtensions
+    /// </summary>
+    public static class BaseExtensions
+    {
+        public static ICryptographyProvider CryptographyProvider { get; set; }
+
+        public static string RemoveDiacritics(this string text)
+        {
+            return String.Concat(
+                text.Normalize(NormalizationForm.FormD)
+                .Where(ch => CharUnicodeInfo.GetUnicodeCategory(ch) !=
+                                              UnicodeCategory.NonSpacingMark)
+              ).Normalize(NormalizationForm.FormC);
+        }
+    }
+}