diff --git a/Falcon.SugarApi.Test/IEnumerableExtendTest.cs b/Falcon.SugarApi.Test/IEnumerableExtendTest.cs
index c2626bb..0d475b9 100644
--- a/Falcon.SugarApi.Test/IEnumerableExtendTest.cs
+++ b/Falcon.SugarApi.Test/IEnumerableExtendTest.cs
@@ -28,23 +28,23 @@ namespace Falcon.SugarApi.Test
             Assert.AreEqual(2,r.Rows.Count);
             //测试列
             var col1 = r.Columns[0];
-            Assert.IsTrue(col1.ColumnName == "a");
-            Assert.IsTrue(col1.DataType == typeof(int));
+            Assert.IsTrue(col1.ColumnName=="a");
+            Assert.IsTrue(col1.DataType==typeof(int));
             var col2 = r.Columns[1];
-            Assert.IsTrue(col2.ColumnName == "b");
-            Assert.IsTrue(col2.DataType == typeof(string));
+            Assert.IsTrue(col2.ColumnName=="b");
+            Assert.IsTrue(col2.DataType==typeof(string));
             var col3 = r.Columns[2];
-            Assert.IsTrue(col3.ColumnName == "c");
-            Assert.IsTrue(col3.DataType == typeof(int));
+            Assert.IsTrue(col3.ColumnName=="c");
+            Assert.IsTrue(col3.DataType==typeof(int));
             //测试行
             var row = r.Rows[0];
-            Assert.IsTrue(row[0].ToString() == "1");
-            Assert.IsTrue(row[1].ToString() == "b1");
-            Assert.IsTrue(row[2].ToString() == "");
-            row = r.Rows[1];
-            Assert.IsTrue((int)row[0] == 2);
-            Assert.IsTrue((string)row[1] == "b2");
-            Assert.IsTrue((int)row[2] == 1);
+            Assert.IsTrue(row[0].ToString()=="1");
+            Assert.IsTrue(row[1].ToString()=="b1");
+            Assert.IsTrue(row[2].ToString()=="");
+            row=r.Rows[1];
+            Assert.IsTrue((int)row[0]==2);
+            Assert.IsTrue((string)row[1]=="b2");
+            Assert.IsTrue((int)row[2]==1);
             Console.WriteLine($"ToDataTable测试完成");
 
             var models = new List<ToDataTableTestModel> {
@@ -52,7 +52,7 @@ namespace Falcon.SugarApi.Test
                 new ToDataTableTestModel{id=2,Name="name2" },
             };
             sw.Reset();
-            r = models.ToDataTable();
+            r=models.ToDataTable();
             sw.Stop();
             Console.WriteLine($"ToDataTable<>转换，共用时{sw.ElapsedMilliseconds}毫秒");
             //测试表
@@ -60,19 +60,19 @@ namespace Falcon.SugarApi.Test
             Assert.AreEqual(2,r.Columns.Count);
             Assert.AreEqual(2,r.Rows.Count);
             //测试列
-            col1 = r.Columns[0];
-            Assert.IsTrue(col1.ColumnName == "id");
-            Assert.IsTrue(col1.DataType == typeof(int));
-            col2 = r.Columns[1];
-            Assert.IsTrue(col2.ColumnName == "Name");
-            Assert.IsTrue(col2.DataType == typeof(string));
+            col1=r.Columns[0];
+            Assert.IsTrue(col1.ColumnName=="id");
+            Assert.IsTrue(col1.DataType==typeof(int));
+            col2=r.Columns[1];
+            Assert.IsTrue(col2.ColumnName=="Name");
+            Assert.IsTrue(col2.DataType==typeof(string));
             //测试行
-            row = r.Rows[0];
-            Assert.IsTrue(row[0].ToString() == "1");
-            Assert.IsTrue(row[1].ToString() == "");
-            row = r.Rows[1];
-            Assert.IsTrue((int)row[0] == 2);
-            Assert.IsTrue(row[1].ToString() == "name2");
+            row=r.Rows[0];
+            Assert.IsTrue(row[0].ToString()=="1");
+            Assert.IsTrue(row[1].ToString()=="");
+            row=r.Rows[1];
+            Assert.IsTrue((int)row[0]==2);
+            Assert.IsTrue(row[1].ToString()=="name2");
             Console.WriteLine($"ToDataTable<>测试完成");
 
 
@@ -81,10 +81,10 @@ namespace Falcon.SugarApi.Test
         [TestMethod("Reduce测试")]
         public void ReduceTest() {
             var list = new List<int> { 1,2,3,4 };
-            var sum = list.Reduce((a,b) => a + b,0);
-            Assert.IsTrue(sum == 10,"对数组求和错误");
-            sum = list.Reduce(0,(a,b) => a + b);
-            Assert.IsTrue(sum == 10,"对数组求和错误");
+            var sum = list.Reduce((a,b) => a+b,0);
+            Assert.IsTrue(sum==10,"对数组求和错误");
+            sum=list.Reduce(0,(a,b) => a+b);
+            Assert.IsTrue(sum==10,"对数组求和错误");
 
             var people = new List<person> {
                 new person{ IsMan=true,age=30 },
@@ -92,10 +92,10 @@ namespace Falcon.SugarApi.Test
                 new person{ IsMan=true,age=50 },
                 new person{ IsMan=true,age=60 },
             };
-            var sumage = people.Reduce((a,b) => a + (b.IsMan ? b.age : 0),0);
-            Assert.IsTrue(sumage == 30 + 50 + 60,"有条件求和错误");
-            sumage = people.Reduce(0,(a,b) => b.IsMan ? a + b.age : a);
-            Assert.IsTrue(sumage == 30 + 50 + 60,"有条件求和错误");
+            var sumage = people.Reduce((a,b) => a+(b.IsMan ? b.age : 0),0);
+            Assert.IsTrue(sumage==30+50+60,"有条件求和错误");
+            sumage=people.Reduce(0,(a,b) => b.IsMan ? a+b.age : a);
+            Assert.IsTrue(sumage==30+50+60,"有条件求和错误");
 
             var men = people.Reduce((a,b) => {
                 if(b.IsMan) {
@@ -106,7 +106,7 @@ namespace Falcon.SugarApi.Test
             foreach(var p in men) {
                 Assert.IsTrue(p.IsMan,"缩减为男性集合错误！");
             }
-            men = people.Reduce(new List<person>(),(a,b) => {
+            men=people.Reduce(new List<person>(),(a,b) => {
                 if(b.IsMan) {
                     a.Add(b);
                 }
@@ -118,7 +118,20 @@ namespace Falcon.SugarApi.Test
 
             var arr = new string[] { };
             var initVal = arr.Reduce((a,b) => throw new Exception("空集合不可以调用缩减方法"),"abc");
-            Assert.IsTrue(initVal == "abc","空集合返回初始值，并且不调用缩减方法。");
+            Assert.IsTrue(initVal=="abc","空集合返回初始值，并且不调用缩减方法。");
+        }
+
+        [TestMethod("IsNullOrEmpty测试")]
+        public void IsNullOrEmptyTest() {
+            List<int> list = null;
+            Assert.IsTrue(list.IsNullOrEmpty());
+            Assert.IsFalse(list.IsNotNullOrEmpty());
+            list=new List<int>();
+            Assert.IsTrue(list.IsNullOrEmpty());
+            Assert.IsFalse(list.IsNotNullOrEmpty());
+            list.Add(1);
+            Assert.IsFalse(list.IsNullOrEmpty());
+            Assert.IsTrue(list.IsNotNullOrEmpty());
         }
     }
 
diff --git a/Falcon.SugarApi/IEnumerableExtend.cs b/Falcon.SugarApi/IEnumerableExtend.cs
index 67c82ce..c1eeb16 100644
--- a/Falcon.SugarApi/IEnumerableExtend.cs
+++ b/Falcon.SugarApi/IEnumerableExtend.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Data;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
 
@@ -18,18 +19,18 @@ namespace Falcon.SugarApi
         /// <returns>转换后Datatable</returns>
         /// <exception cref="ArgumentNullException">参数为Null</exception>
         public static DataTable ToDataTable(this IEnumerable<object> source) {
-            _ = source ?? throw new ArgumentNullException(nameof(source));
+            _=source??throw new ArgumentNullException(nameof(source));
             var dt = new DataTable();
-            if(source.Count() == 0) {
+            if(source.Count()==0) {
                 return dt;
             }
-            for(int i = 0;i < source.Count();i++) {
+            for(int i = 0;i<source.Count();i++) {
                 var item = source.ToArray()[i];
                 foreach(PropertyInfo pro in item.GetType().GetProperties()) {
                     if(!dt.Columns.Contains(pro.Name)) {
                         dt.Columns.Add(new DataColumn {
-                            ColumnName = pro.Name,
-                            DataType = pro.PropertyType,
+                            ColumnName=pro.Name,
+                            DataType=pro.PropertyType,
                         });
                     }
                 }
@@ -40,8 +41,9 @@ namespace Falcon.SugarApi
                     if(p.CanRead) {
                         var val = p.GetValue(i);
                         try {
-                            row[p.Name] = val;
-                        } catch(Exception ex) {
+                            row[p.Name]=val;
+                        }
+                        catch(Exception ex) {
                             throw new Exception($"值设置失败！{p.Name}:{val}",ex);
                         }
                     }
@@ -59,15 +61,15 @@ namespace Falcon.SugarApi
         /// <returns>转换后Datatable</returns>
         /// <exception cref="ArgumentNullException">参数为Null</exception>
         public static DataTable ToDataTable<T>(this IEnumerable<T> source) {
-            _ = source ?? throw new ArgumentNullException(nameof(source));
+            _=source??throw new ArgumentNullException(nameof(source));
             var type = typeof(T);
             var dt = new DataTable();
             var pros = typeof(T).GetProperties();
             foreach(PropertyInfo p in pros) {
                 if(p.CanRead) {
                     dt.Columns.Add(new DataColumn {
-                        ColumnName = p.Name,
-                        DataType = p.PropertyType,
+                        ColumnName=p.Name,
+                        DataType=p.PropertyType,
                     });
                 }
             }
@@ -76,7 +78,7 @@ namespace Falcon.SugarApi
                 foreach(var p in pros) {
                     if(p.CanRead) {
                         var val = p.GetValue(i);
-                        row[p.Name] = val;
+                        row[p.Name]=val;
                     }
                 }
                 dt.Rows.Add(row);
@@ -94,12 +96,12 @@ namespace Falcon.SugarApi
         /// <param name="initialValue">缩减初始值</param>
         /// <returns>缩减结果</returns>
         public static TR Reduce<T, TR>(this IEnumerable<T> source,Func<TR,T,TR> reduceFunc,TR initialValue) {
-            if(reduceFunc == null) {
+            if(reduceFunc==null) {
                 throw new ArgumentNullException(nameof(reduceFunc));
             }
             var result = initialValue;
             foreach(var i in source) {
-                result = reduceFunc(result,i);
+                result=reduceFunc(result,i);
             }
             return result;
         }
@@ -114,14 +116,33 @@ namespace Falcon.SugarApi
         /// <param name="initialValue">缩减初始值</param>
         /// <returns>缩减结果</returns>
         public static TR Reduce<T, TR>(this IEnumerable<T> source,TR initialValue,Func<TR,T,TR> reduceFunc) {
-            if(reduceFunc == null) {
+            if(reduceFunc==null) {
                 throw new ArgumentNullException(nameof(reduceFunc));
             }
             var result = initialValue;
+            if(source.IsNull()) {
+
+            }
             foreach(var i in source) {
-                result = reduceFunc(result,i);
+                result=reduceFunc(result,i);
             }
             return result;
         }
+
+        /// <summary>
+        /// 返回枚举是否为null或者集合无元素
+        /// </summary>
+        /// <typeparam name="T">枚举的元素类型</typeparam>
+        /// <param name="values">枚举对象</param>
+        /// <returns>为null或者无元素返回True，否则False</returns>
+        public static bool IsNullOrEmpty<T>([AllowNull] this IEnumerable<T> values) => values==null||values.Count()==0;
+
+        /// <summary>
+        /// 返回枚举是否不为null或者集合无元素，结果是对IsNullOrEmpty去反。
+        /// </summary>
+        /// <typeparam name="T">枚举的元素类型</typeparam>
+        /// <param name="values">枚举对象</param>
+        /// <returns>枚举不为null或者无元素返回True，否则False</returns>
+        public static bool IsNotNullOrEmpty<T>([AllowNull] this IEnumerable<T> values) => !values.IsNullOrEmpty();
     }
 }