version.props

<Project>
  <PropertyGroup>
    <VersionPrefix>0.3.0</VersionPrefix>
    <VersionSuffix>rtm</VersionSuffix>
    <PackageVersion Condition="'$(APPVEYOR_REPO_TAG)' == 'true' AND '$(VersionSuffix)' != ''">$(VersionPrefix)-$(VersionSuffix)</PackageVersion>
    <PackageVersion Condition="'$(APPVEYOR_REPO_TAG)' == 'true' AND '$(VersionSuffix)' == 'rtm'">$(VersionPrefix)</PackageVersion>

    <BuildNumber Condition=" '$(BuildNumber)' == '' ">$(APPVEYOR_BUILD_NUMBER)</BuildNumber>
    <BuildNumber Condition=" '$(BuildNumber)' == '' ">0</BuildNumber>
    <FileVersion>$(VersionPrefix).$(BuildNumber)</FileVersion>
    <VersionSuffix Condition=" '$(VersionSuffix)' != '' ">$(VersionSuffix).$(BuildNumber)</VersionSuffix>
  </PropertyGroup>

  <ItemGroup>
    <AssemblyAttribute Include="System.Reflection.AssemblyMetadataAttribute">
      <_Parameter1>BuildNumber</_Parameter1>
      <_Parameter2>$(BuildNumber)</_Parameter2>
    </AssemblyAttribute>
  </ItemGroup>
</Project>