有条件改变目标框架版本 [英] Conditionally changing target framework version

问题描述

我试图编译＃ifdef'd代码库到两个不同的目标框架，即3.5和4.0。

I'm trying to compile an #ifdef'd codebase to two different target frameworks, namely 3.5 and 4.0.

我试图修改.proj文件该解决方案也没有用。

I attempted to modify the .proj files in the solution to no avail.

看来的MSBuild / VS2012是不是捡了通过用户界面解决方案配置的变化。

It seems MSBuild / VS2012 isn't picking up the solution configuration change via UI.

这是.proj文件中的一个片段：

This is a fragment of one of the .proj files:

  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>..\Binaries\</OutputPath>
    <DefineConstants>TRACE;NET35</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug 40|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <OutputPath>..\Binaries\</OutputPath>
    <DefineConstants>TRACE;DEBUG;NET40</DefineConstants>
    <DebugType>full</DebugType>
    <PlatformTarget>AnyCPU</PlatformTarget>
    <ErrorReport>prompt</ErrorReport>
    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
  </PropertyGroup>

当我切换到调试40，从放的目标框架并不在项目变更性能（从而打破，因为其他条件引用的程序集的编译）。

When I switch to "Debug 40" from "Release" the target framework does not change in the project properties (thus breaking the compilation because of other conditionally referenced assemblies).

我也有参考条件不同的组件，问题仿佛再次，解决方案配置ISN ：T拾起VS /的MSBuild（有的甚至在参考文献中显示）

I'm also having problems conditionally referencing different assemblies, as if, again, the solution configuration isn't picked up by VS/MSBuild (some don't even show up in the references).

编辑：我从V3.5版本不包括Microsoft.CSharp使用以下行：

I'm excluding Microsoft.CSharp from the v3.5 build with the following line:

<Reference Include="Microsoft.CSharp" Condition=" '$(Configuration)' == 'Debug 40'" />

到目前为止，似乎它只是被忽略TargetFrameworkVersion属性。

So far it seems it's just the TargetFrameworkVersion property that is ignored.

推荐答案

原来，问题是双重的：

• ReSharper的（第7版）通过显示在不同的文件编译错误，使其难以实现真正有条件引用编译的代码使事情变得更难。我认为，第7版不支持手动项目文件的变化，所以一个头高达RS7用户。


• 编译时实际使用正确的框架VS2012不改变UI中的目标框架（尽管，为的MSBuild的详细输出看到）。

我最终设法让代码库编译有点耐心。
按@ granataCoder的建议，这也是更好地保持不同的输出路径（可能很容易像条件编译正交问题时忽略）。

I eventually managed to get the codebase to compile with a bit of patience. As per @granataCoder's suggestion, it's also better to keep different output paths (might be easy to overlook when dealing with orthogonal issues like conditional compilation).

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