diff --git a/LinqStudy.Test/LinqStudy.Test.csproj b/LinqStudy.Test/LinqStudy.Test.csproj
index eb3dddd..0e3da8f 100644
--- a/LinqStudy.Test/LinqStudy.Test.csproj
+++ b/LinqStudy.Test/LinqStudy.Test.csproj
@@ -18,7 +18,6 @@
 
   <ItemGroup>
     <Folder Include="ExpressionTree\" />
-    <Folder Include="LinqBase\" />
     <Folder Include="LinqToDataSet\" />
     <Folder Include="LinqToSQL\" />
     <Folder Include="LinqToXml\" />
diff --git a/LinqStudy.Test/LinqToObject/LinqTest.cs b/LinqStudy.Test/LinqToObject/LinqTest.cs
deleted file mode 100644
index b955451..0000000
--- a/LinqStudy.Test/LinqToObject/LinqTest.cs
+++ /dev/null
@@ -1,45 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Linq;
-using System.Linq.Expressions;
-using FluentAssertions;
-
-using Xunit;
-
-namespace LinqStudy.Test.LinqToObject
-{
-    /// <summary>
-    /// 基本项测试
-    /// 异常、空值等项
-    /// </summary>
-    public class LinqTest
-    {
-        [Fact]
-        public void Null_Test()
-        {
-            List<Person> person = null;
-
-            //对Linq操作符而言，基本上数据源为Null时，将引发异常。
-            Assert.ThrowsAny<ArgumentNullException>(() => 
-            {
-                var query = person.Where(p => p == null);
-            });
-        }
-
-        [Fact]
-        public void Count_0_Test()
-        {
-            List<Person> person = new List<Person>();
-
-            //数据源为没有任何内容项时，即 Count=0，不会引发异常。
-            Action action = () => 
-            {
-                //查不到任何数据，不返回null，而是返回 Count=0的对象。
-                person.Where(p => p == null).ToList();
-            };
-
-            action.Should().NotThrow();
-        }
-    }
-}
diff --git a/LinqStudy.Test/LinqToObject/SelectTest.cs b/LinqStudy.Test/LinqToObject/SelectTest.cs
deleted file mode 100644
index 21331d7..0000000
--- a/LinqStudy.Test/LinqToObject/SelectTest.cs
+++ /dev/null
@@ -1,29 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
-
-using Xunit;
-
-using LinqStudy;
-
-namespace LinqStudy.Test.LinqToObject
-{
-    /// <summary>
-    /// Select 测试
-    /// </summary>
-    public class SelectTest
-    {
-        [Fact]
-        public void TestName()
-        {
-            // Arrange
-            var persons = PersonManager.GetPersons();
-            // Act
-            var maps=persons.Select(p=>p.Age).ToList();
-            
-            // Assert
-            Assert.IsType<List<int>>(maps);
-        }
-    }
-}
diff --git a/LinqStudy.sln b/LinqStudy.sln
index 81519e0..78602ff 100644
--- a/LinqStudy.sln
+++ b/LinqStudy.sln
@@ -3,9 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.29215.179
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LinqStudy", "LinqStudy\LinqStudy.csproj", "{5867719F-953F-4216-B245-4937B9DCF997}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LinqStudy", "LinqStudy\LinqStudy.csproj", "{5867719F-953F-4216-B245-4937B9DCF997}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LinqStudy.Test", "LinqStudy.Test\LinqStudy.Test.csproj", "{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LinqStudy.Test", "LinqStudy.Test\LinqStudy.Test.csproj", "{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution