Turns on symbols if package is generated for the project

Author: alex-kulakov

Directory.Build.props

@@ -44,6 +44,8 @@
     <GeneratePackageOnBuild Condition="$(MSBuildProjectName) == 'TestCommon'">false</GeneratePackageOnBuild>
     <GeneratePackageOnBuild Condition="$(MSBuildProjectName.Contains('Tests')) == 'true'">false</GeneratePackageOnBuild>
     <GeneratePackageOnBuild Condition="$(GeneratePackageOnBuild)=='' AND '$(Configuration)' == 'Release'">true</GeneratePackageOnBuild>
+    <IncludeSymbols Condition="$(GeneratePackageOnBuild) == 'true'">true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
 
   <!-- Populate standard properties. -->