包含C#6.0代码的MSBuild命令行无法生成

我在让MSBuild编译c#6.0代码时遇到问题，它在尝试生成表达式体语法etx时报告失败

所以我多年来一直在创建这样的构建项目。我有一个powershell脚本，它使用一些参数启动msbuild：

msbuild.exe _build\build.proj
        /p:Build_Number=1.2.0
        /p:Configuration=QA
        /p:SolutionName=MPGCS-Api.sln
        /ToolsVersion:14.0

我验证了msbuild.exe来自C:\Program Files（x86）\msbuild\14.0\Bin，为此，我进入该文件夹并指定.proj文件的完整物理路径。我得到了同样的精确错误

我一直在寻找一个关于如何使用C#6.0设置MSBuild项目文件的示例，但运气不佳，因此这是我的基本设置（这是build.proj文件）。如果我不得不猜测我没有导入正确的目标，等等，但是我有点迷路了。这是我的项目文件：

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Root>$(MSBuildStartupDirectory)</Root>
    <NugetExe>$(Root)\_build\lib\nuget\nuget.exe</NugetExe>
    <Build_Number>0.0.0</Build_Number>
    <SolutionName></SolutionName>
    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
    <VisualStudioVersion>14.0</VisualStudioVersion>
  </PropertyGroup>

  <Target Name="Clean">
    <!-- Clean up -->
    <ItemGroup>
      <FilesToDelete Include="$(Root)\_build\Artifacts\**\*.*" />
      <FilesToDelete Include="$(Root)\_build\Published\**\*.*" />
    </ItemGroup>
    <Delete Files="@(FilesToDelete)" ContinueOnError="false" />

    <!-- Ensure directories exists -->
    <MakeDir Directories="$(MSBuildProjectDirectory)\Artifacts" Condition="!Exists('$(MSBuildProjectDirectory)\Artifacts')" />
    <MakeDir Directories="$(MSBuildProjectDirectory)\Published" Condition="!Exists('$(MSBuildProjectDirectory)\Artifacts')" />
  </Target>

  <Target Name="Debug" AfterTargets="Clean">
    <!-- Diagnostics -->
    <Message Text="Diagnostics:"/>
    <Message Text="Build Number:    $(build_number)" />
    <Message Text="Configuration:    $(Configuration)" />
    <Message Text="VisualStudioVersion:    $(VisualStudioVersion)" />
    <Message Text="Project root:    $(Root)" />

    <!-- Restore Nuget Packages -->
    <Message Text="Restoring nuget..."/>
    <Exec Command="$(NugetExe) restore $(Root)\$(SolutionName)" />
  </Target>

  <Target Name="GenerateOctopackAPI" AfterTargets="Debug">
    <ItemGroup>
      <ProjectToBuild Include="$(Root)\MPG.CS.Api\MPG.CS.Api.csproj" />
    </ItemGroup>
    <MSBuild Projects="@(ProjectToBuild)" ContinueOnError="false" Targets="Rebuild" Properties="
      RunOctoPack=true;
      Configuration=$(ProjectBuildMode);
      Platform=AnyCpu;
      TargetFrameworkVersion=$(TargetFrameworkVersion);
      VisualStudioVersion=$(VisualStudioVersion);
      OctoPackPublishPackageToFileShare=$(Root)\_build\Artifacts;
      OctoPackPackageVersion=$(Build_Number);
      OctoPackProjectName=UI;
      OutputPath=bin\$(ProjectBuildMode)" />
    </Target>
</Project>

下面是一个示例错误，它在c#6.0代码上基本失败，如果我删除c#6代码，所有内容都将编译：

TicketType.cs(19,28): error CS1002: ; expected [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.csproj]
  TicketType.cs(19,44): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.cs proj]
  TicketStatus.cs(16,36): error CS1002: ; expected [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.csproj]
  TicketStatus.cs(16,53): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model. csproj]
  TicketStatus.cs(16,82): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model. csproj]

下面是一行它失败的代码（C#6代码）：

---

我不知所措，我以为只要使用正确的msbuild.exe就可以利用c#6.0。任何帮助都将不胜感激

如果在独立于开发环境的构建服务器上运行powershell脚本，则需要确保机器本身能够处理C#6.0。由于它同时使用不同的编译器，如果不安装VS 2015，它将无法工作。或者，您可以添加nuget包作为依赖项，以允许VS 2012和VS 2013对其进行编译

我正在本地运行。你能告诉我你安装了什么版本的VS和.NET吗？并发布在MSBuild期间发生爆炸的行（或simailar行）？我已安装VS 2015，我将使用失败的示例代码更新问题。我还必须安装nuget软件包Microsoft.Net.Compilers：请参阅中的我的答案：

TicketType.cs(19,28): error CS1002: ; expected [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.csproj]
  TicketType.cs(19,44): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.cs proj]
  TicketStatus.cs(16,36): error CS1002: ; expected [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model.csproj]
  TicketStatus.cs(16,53): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model. csproj]
  TicketStatus.cs(16,82): error CS1519: Invalid token '(' in class, struct, or interface member declaration [C:\dev\mpg\MPGCS-Api\MPG.CS.Model\MPG.CS.Model. csproj]

public bool IsAbbreviated  => (Title.ToLower() == "open" || Title.ToLower() == "closed");