Updated build to use gitlink

Author: niemyjski

build/common.props

@@ -1,6 +1,13 @@
 <Project ToolsVersion="15.0">
   <Import Project="version.props" />
-  
+
+  <PropertyGroup Label="Source Link">
+    <ProjectParentDirectory>$([System.IO.Path]::GetDirectoryName('$(MSBuildProjectDirectory)'))</ProjectParentDirectory>
+    <ProjectParentDirectoryName>$([System.IO.Path]::GetFileName('$(ProjectParentDirectory)'))</ProjectParentDirectoryName>
+  </PropertyGroup>
+
+  <Import Project="sourcelink.props" Condition="'$(ProjectParentDirectoryName)' == 'src'" />
+
   <PropertyGroup Label="Build">
     <DebugType>portable</DebugType>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
@@ -25,8 +32,6 @@
     <Authors>Exceptionless</Authors>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageOutputPath>$(SolutionDir)artifacts</PackageOutputPath>
-    <IncludeSymbols>True</IncludeSymbols>
-    <IncludeSource>True</IncludeSource>
 
     <PackageReleaseNotes>https://github.com/exceptionless/Exceptionless.Net/releases</PackageReleaseNotes>
     <PackageIconUrl>https://be.exceptionless.io/img/exceptionless-32.png</PackageIconUrl>

build/sourcelink.props

@@ -0,0 +1,11 @@
+<Project>
+  <PropertyGroup>
+    <DebugType>embedded</DebugType>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SourceLink.Create.GitHub" Version="2.1.2" PrivateAssets="all" />
+    <DotNetCliToolReference Include="dotnet-sourcelink-git" Version="2.1.2" />
+    <DotNetCliToolReference Include="dotnet-sourcelink" Version="2.1.2" />
+  </ItemGroup>
+</Project>