操作符，初步完成

LinqStudy.Test/LinqToObject/SetsTest.cs

@@ -275,6 +275,111 @@ namespace LinqStudy.Test.LinqToObject
 
             Assert.Empty(intesectItem);
         }
+
+        ///<summary>
+        /// 重载：自定义比较器 comparer
+        ///</sumaary>
+        [Fact]
+        public void Intersect_comparer_Test()
+        {
+            List<Person> peoples1 = new List<Person>()
+            {
+                new Person(){ Id=1, Name="杨过", Age=32},
+                new Person(){ Id=2, Name="小龙女", Age=28},
+
+            };
+
+            List<Person> peoples2 = new List<Person>()
+            {
+                new Person(){ Id=2, Name="小龙女", Age=28},
+                new Person(){ Id=3, Name="云花公主", Age=16},
+            };
+
+            //虽然两个“小龙女”属性相同，但不是一个对象，没有交集。
+            var intesectItem = peoples1.Intersect(peoples2, new PersonEqualityComparerById());
+            var intesctItemName = intesectItem.First().Name;
+
+            Assert.Equal("小龙女", intesctItemName);
+        }
+        #endregion
+
+        #region Intersect
+
+        ///<summary>
+        /// Except: 从一个序列中排除另一个序列中的项。
+        ///</summary>
+        [Fact]
+        public void Except_Test()
+        {
+            var p1 = new Person() { Id = 1, Name = "杨过", Age = 32 };
+            var p2 = new Person() { Id = 2, Name = "小龙女", Age = 28 };
+            var p3 = new Person() { Id = 3, Name = "云花公主", Age = 16 };
+
+            List<Person> peoples1 = new List<Person>()
+            {
+                p1,p2,
+            };
+
+            List<Person> peoples2 = new List<Person>()
+            {
+                p1,p3,
+            };
+
+            var exceptItem = peoples1.Except(peoples2);
+            var itemName = exceptItem.First().Name;
+
+            Assert.Equal("小龙女", itemName);
+        }
+
+        ///<summary>
+        /// 引用类型：使用
+        ///</sumaary>
+        [Fact]
+        public void Except_Reference_Test()
+        {
+            List<Person> peoples1 = new List<Person>()
+            {
+                new Person(){ Id=1, Name="杨过", Age=32},
+                new Person(){ Id=2, Name="小龙女", Age=28},
+
+            };
+
+            List<Person> peoples2 = new List<Person>()
+            {
+                new Person(){ Id=2, Name="小龙女", Age=28},
+                new Person(){ Id=3, Name="云花公主", Age=16},
+            };
+
+            var exceptItem = peoples1.Except(peoples2);
+            var itemCount = exceptItem.Count();
+
+            Assert.Equal(2, itemCount);
+        }
+
+        ///<summary>
+        /// 重载：自定义比较器 comparer
+        ///</sumaary>
+        [Fact]
+        public void Except_comparer_Test()
+        {
+            List<Person> peoples1 = new List<Person>()
+            {
+                new Person(){ Id=1, Name="杨过", Age=32},
+                new Person(){ Id=2, Name="小龙女", Age=28},
+
+            };
+
+            List<Person> peoples2 = new List<Person>()
+            {
+                new Person(){ Id=2, Name="小龙女", Age=28},
+                new Person(){ Id=3, Name="云花公主", Age=16},
+            };
+
+            var exceptItem = peoples1.Except(peoples2, new PersonEqualityComparerById());
+            var iexcepItemName = exceptItem.First().Name;
+
+            Assert.Equal("杨过", iexcepItemName);
+        }
         #endregion
     }
 }