Cache cleanup implemented

API/Extensions/DirectoryInfoExtensions.cs

@@ -0,0 +1,11 @@
+namespace API.Extensions
+{
+    public static class DirectoryInfoExtensions
+    {
+        public static void Empty(this System.IO.DirectoryInfo directory)
+        {
+            foreach(System.IO.FileInfo file in directory.EnumerateFiles()) file.Delete();
+            foreach(System.IO.DirectoryInfo subDirectory in directory.EnumerateDirectories()) subDirectory.Delete(true);
+        }
+    }
+}