first things

BusinessLogic/SearchLogic/ISearchLogic.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using Datamodels.BusinessModels;
+using Datamodels.DatabaseModels;
+using Datamodels.SearchModels;
+
+namespace SearchLogic
+{
+    public interface ISearchLogic
+    {
+        Task<DataResult<List<Address>>> GetAllAddresses();
+        Task<DataResult<ResultModel>> GetFilteredData(FilterModel filter, long skip = 0, long take = -1);
+    }
+}