添加项目文件。

IM.Commons/ISpecification.cs

@@ -0,0 +1,14 @@
+using System.Linq.Expressions;
+
+namespace IM.Commons
+{
+    public interface ISpecification<T, TResut> : ISpecification<T>
+    {
+        public Expression<Func<T, TResut>> Select { get; }
+    }
+    public interface ISpecification<T>
+    {
+        Expression<Func<T, bool>> Criteria { get; }
+        List<Expression<Func<T, object>>> Includes { get; }
+    }
+}