Generate XML documentation file

Author: FlorianRappl

AngleSharp.Io/AngleSharp.Io.csproj

@@ -20,6 +20,8 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <DocumentationFile>
+    </DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -28,6 +30,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <DocumentationFile>bin\Release\AngleSharp.Io.xml</DocumentationFile>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="AngleSharp">