Fix OpenCover execution by setting debugging information to pdb-only

Author: Krusen

BencodeNET/BencodeNET.csproj

@@ -26,6 +26,10 @@
     <DefineConstants>$(DefineConstants);NETSTANDARD</DefineConstants>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net45|AnyCPU'">
+    <DebugType>pdbonly</DebugType>
+  </PropertyGroup>
+
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
     <Reference Include="System" />
     <Reference Include="Microsoft.CSharp" />