diff --git a/Study.DelegateSeries.Test/Study.DelegateSeries.Test.csproj b/Study.DelegateSeries.Test/Study.DelegateSeries.Test.csproj
index c5317ee..3f5f26d 100644
--- a/Study.DelegateSeries.Test/Study.DelegateSeries.Test.csproj
+++ b/Study.DelegateSeries.Test/Study.DelegateSeries.Test.csproj
@@ -7,11 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Remove="UseXUnitDemo.cs" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.1.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
       <PrivateAssets>all</PrivateAssets>
diff --git a/Study.DelegateSeries.Test/UnitTest1.cs b/Study.DelegateSeries.Test/UnitTest1.cs
new file mode 100644
index 0000000..253f536
--- /dev/null
+++ b/Study.DelegateSeries.Test/UnitTest1.cs
@@ -0,0 +1,14 @@
+using System;
+using Xunit;
+
+namespace Study.DelegateSeries.Test
+{
+    public class UnitTest1
+    {
+        [Fact]
+        public void Test1()
+        {
+
+        }
+    }
+}
diff --git a/委托系列学习.sln b/委托系列学习.sln
index 34fdbdf..91b7050 100644
--- a/委托系列学习.sln
+++ b/委托系列学习.sln
@@ -11,7 +11,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Study.DelegateSeries.Core",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Study.DelegateSeries.MarkdownDoc", "Study.DelegateSeries.MarkdownDoc\Study.DelegateSeries.MarkdownDoc.csproj", "{F31847FB-C413-44A5-BCF0-1D7399CE4A7C}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Study.DelegateSeries.Test", "Study.DelegateSeries.Test\Study.DelegateSeries.Test.csproj", "{E628163C-0A3A-4A78-BC68-2C77D66C8EEF}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Study.DelegateSeries.Test", "Study.DelegateSeries.Test\Study.DelegateSeries.Test.csproj", "{BA530B6C-90AC-4179-910B-C138DFAF8E17}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -27,10 +27,10 @@ Global
 		{F31847FB-C413-44A5-BCF0-1D7399CE4A7C}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F31847FB-C413-44A5-BCF0-1D7399CE4A7C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F31847FB-C413-44A5-BCF0-1D7399CE4A7C}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E628163C-0A3A-4A78-BC68-2C77D66C8EEF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E628163C-0A3A-4A78-BC68-2C77D66C8EEF}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E628163C-0A3A-4A78-BC68-2C77D66C8EEF}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E628163C-0A3A-4A78-BC68-2C77D66C8EEF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BA530B6C-90AC-4179-910B-C138DFAF8E17}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BA530B6C-90AC-4179-910B-C138DFAF8E17}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BA530B6C-90AC-4179-910B-C138DFAF8E17}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BA530B6C-90AC-4179-910B-C138DFAF8E17}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -38,7 +38,7 @@ Global
 	GlobalSection(NestedProjects) = preSolution
 		{6801B518-6303-4CB6-95BB-0B3A81DA2617} = {0CDDA35F-F045-4BE9-8C0F-D1A9C1BE433C}
 		{F31847FB-C413-44A5-BCF0-1D7399CE4A7C} = {D8C26D31-979E-4492-A3CD-C325BCD13097}
-		{E628163C-0A3A-4A78-BC68-2C77D66C8EEF} = {0CDDA35F-F045-4BE9-8C0F-D1A9C1BE433C}
+		{BA530B6C-90AC-4179-910B-C138DFAF8E17} = {0CDDA35F-F045-4BE9-8C0F-D1A9C1BE433C}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0C61CBE2-3F09-492A-993F-549076A3F16B}