Add project files.

SytelineSaAppEfDataModel/Services/IErrorLogService.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SytelineSaAppEfDataModel.Dtos;
+
+namespace SytelineSaAppEfDataModel.Services
+{
+    public interface IErrorLogService
+    {
+        Task<IEnumerable<ErrorLogDto>> GetAll();
+        Task<IEnumerable<ErrorLogDto>> GetByOrderNumber(string customerOrderNumber);
+    }
+}