refactoring the code.

Oqtane.Shared/Interfaces/ISearchable.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Oqtane.Models;
+
+namespace Oqtane.Interfaces
+{
+    public interface ISearchable
+    {
+        public IList<SearchContent> GetSearchContentList(Module module, DateTime startTime);
+    }
+}