diff --git a/xUnitStudy.Model/xUnitStudy/Person.cs b/xUnitStudy.Model/xUnitStudy/Person.cs
index 3a38985..bac478e 100644
--- a/xUnitStudy.Model/xUnitStudy/Person.cs
+++ b/xUnitStudy.Model/xUnitStudy/Person.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace xUnitStudy.Model
 {
-    public class Person:IPerson,IEqualityComparer<Person>
+    public class Person:IPerson,IEqualityComparer<Person>,IComparer<Person>
     {
         public int Id { get; set; }
 
@@ -27,5 +27,27 @@ namespace xUnitStudy.Model
         {
            return  obj.Id;
         }
+
+        /// <summary>
+        /// IComparer接口实现
+        /// </summary>
+        /// <param name="x">比较对象1</param>
+        /// <param name="y">比较对象2</param>
+        /// <returns>x小于y则返回负整数；x大于y则返回正整数；x等于y则返回0</returns>
+        public int Compare(Person x, Person y)
+        {
+            if (x.Id < y.Id)
+            {
+                return -1;
+            }
+            else if (x.Id == y.Id)
+            {
+                return 0;
+            }
+            else
+            {
+                return 1;
+            }
+        }
     }
 }
diff --git a/xUnitStudy.WebApi.Test/UseXUnitAssertTest.cs b/xUnitStudy.WebApi.Test/UseXUnitAssertTest.cs
index 52c1627..03a6086 100644
--- a/xUnitStudy.WebApi.Test/UseXUnitAssertTest.cs
+++ b/xUnitStudy.WebApi.Test/UseXUnitAssertTest.cs
@@ -1042,6 +1042,28 @@ namespace xUnitStudy.WebApi.Test
         }
         #endregion
 
+        #region InRange
+
+        [Fact]
+        public void InRange_Test()
+        {
+            Assert.InRange(5, 1, 10);
+            Assert.InRange("b", "a", "d");
+        }
+
+        [Fact]
+        public void InRange_IComparable_Test()
+        {
+            IComparer<Person> comparer = new Person();
+
+            Person person1 = new Person() { Id = 1};
+            Person person2 = new Person() { Id = 2};
+            Person person3 = new Person() { Id = 3};
+
+            Assert.InRange(person2, person1, person3, comparer);
+        }
+        #endregion
+
         [Fact]
         public void All_Test()
         {