semoLi

  <PropertyGroup>
    <NetFrameworkVersionNum>$(TargetFrameworkVersion.Replace("v", "").Replace(".", ""))</NetFrameworkVersionNum>
    <!--Add an extra 0 if the version number is 40 or 45 so it can be compared to 401-->
    <NetFrameworkVersionNum Condition="$(NetFrameworkVersionNum.Length) &lt; 3">$(TargetFrameworkVersion.Replace("v", "").Replace(".", ""))0</NetFrameworkVersionNum>
    <!--Don't define your own NET constants - this file will do it for you-->
    <Error Condition=" $(DefineConstants.Contains('NET'))">Don't define your own NET constants</Error>
    <!--Create a version to use with constants NET40, NET401 etc.-->
    <NetFrameworkVersion Condition=" !$(DefineConstants.Contains(';NET')) ">$(TargetFrameworkVersion.Replace("v", "NET").Replace(".", ""))</NetFrameworkVersion>
    <DefineConstants Condition=" !$(DefineConstants.Contains(';NET')) ">$(DefineConstants);$(NetFrameworkVersion)</DefineConstants>
    <!--Define the OR_GREATER constants-->