Add project files.

Calculator.cs

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+namespace TestSourceLink.Samples;
+
+public class Calculator
+{
+    public int Sum(int a, int b)
+    {
+        return a + b;
+    }
+
+    public int Multiply(int a, int b)
+    {
+        return a * b;
+    }
+
+    public double Divide(int a, int b)
+    {
+        return a / b;
+    }
+}

Logging.cs

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+namespace TestSourceLink.Samples;
+
+internal class Logging
+{
+    public void Log(string message)
+    {
+        Console.WriteLine(message);
+    }
+}

TestSourceLink.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <Title>Test SourceLink</Title>
+    <Authors>Osvaldo Calles</Authors>
+    <Company>Home</Company>
+    <Product>TestTools</Product>
+    <Description>NuGet Package with debug symbols</Description>
+    <PackageIcon>icons8-.net-framework-96.png</PackageIcon>
+    <PackageTags>test;sample</PackageTags>
+    <PackageId>Microsoft.Test.NuGetPackages</PackageId>
+    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
+    <Version>1.0.10</Version>
+    <ContinuousIntegrationBuild>True</ContinuousIntegrationBuild>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <!-- Optional: Publish the repository URL in the built .nupkg (in the NuSpec <Repository> element) -->
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+
+    <!-- Optional: Embed source files that are not tracked by the source control manager in the PDB -->
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+
+    <!-- Optional: Build symbol package (.snupkg) to distribute the PDB containing Source Link -->
+    <IncludeSymbols>true</IncludeSymbols>
+    <!--<SymbolPackageFormat>snupkg</SymbolPackageFormat>-->
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="icons8-.net-framework-96.png">
+      <Pack>True</Pack>
+      <PackagePath>\</PackagePath>
+    </None>
+  </ItemGroup>
+</Project>

TestSourceLink.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.4.32817.444
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestSourceLink", "TestSourceLink.csproj", "{4B9AAE55-5165-4CE0-B9A4-F51AB20341F9}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4B9AAE55-5165-4CE0-B9A4-F51AB20341F9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4B9AAE55-5165-4CE0-B9A4-F51AB20341F9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4B9AAE55-5165-4CE0-B9A4-F51AB20341F9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4B9AAE55-5165-4CE0-B9A4-F51AB20341F9}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1A13FBA0-C16F-4D31-B72A-20204F6C2E4C}
+	EndGlobalSection
+EndGlobal