diff --git a/LinqStudy.Test/LinqStudy.Test.csproj b/LinqStudy.Test/LinqStudy.Test.csproj
new file mode 100644
index 0000000..fc5476b
--- /dev/null
+++ b/LinqStudy.Test/LinqStudy.Test.csproj
@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <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>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="ExpressionTree\" />
+    <Folder Include="LinqBase\" />
+    <Folder Include="LinqToDataSet\" />
+    <Folder Include="LinqToObject\" />
+    <Folder Include="LinqToSQL\" />
+    <Folder Include="LinqToXml\" />
+    <Folder Include="Util\" />
+  </ItemGroup>
+
+</Project>
diff --git a/LinqStudy.Test/UseXUnit.cs b/LinqStudy.Test/UseXUnit.cs
new file mode 100644
index 0000000..5113356
--- /dev/null
+++ b/LinqStudy.Test/UseXUnit.cs
@@ -0,0 +1,14 @@
+using System;
+using Xunit;
+
+namespace LinqStudy.Test
+{
+    public class UseXUnit
+    {
+        [Fact]
+        public void Test1()
+        {
+            Assert.True(true,"ʹÓÃxunit¿ò¼Ü£¡");
+        }
+    }
+}
diff --git a/LinqStudy.sln b/LinqStudy.sln
new file mode 100644
index 0000000..81519e0
--- /dev/null
+++ b/LinqStudy.sln
@@ -0,0 +1,31 @@
+
+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}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LinqStudy.Test", "LinqStudy.Test\LinqStudy.Test.csproj", "{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5867719F-953F-4216-B245-4937B9DCF997}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5867719F-953F-4216-B245-4937B9DCF997}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5867719F-953F-4216-B245-4937B9DCF997}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5867719F-953F-4216-B245-4937B9DCF997}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8DC599B0-ADE6-4DBA-9CDC-3094A6DCCBFA}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {D1EC77AC-9C45-43F0-9386-1D9BD5C039F2}
+	EndGlobalSection
+EndGlobal
diff --git a/LinqStudy/Class1.cs b/LinqStudy/Class1.cs
new file mode 100644
index 0000000..d85860f
--- /dev/null
+++ b/LinqStudy/Class1.cs
@@ -0,0 +1,8 @@
+using System;
+
+namespace LinqStudy
+{
+    public class Class1
+    {
+    }
+}
diff --git a/LinqStudy/LinqStudy.csproj b/LinqStudy/LinqStudy.csproj
new file mode 100644
index 0000000..3a5aaa5
--- /dev/null
+++ b/LinqStudy/LinqStudy.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Util\" />
+    <Folder Include="LinqToObject\" />
+    <Folder Include="LinqBase\" />
+    <Folder Include="LinqToXml\" />
+    <Folder Include="LinqToDataSet\" />
+    <Folder Include="LinqToSQL\" />
+    <Folder Include="ExpressionTree\" />
+  </ItemGroup>
+
+</Project>