我在尝试构建 VB.NET 项目时遇到项目级条件编译常量错误。上面写着：
project-level conditional compilation constant 'VB_VER=9.0,TARGET="exe",CONFIG="Debug",_MyType="Console",PLATFORM="AnyCPU",DEBUG;^^ ^^ TRACE' not valid: Character is not valid.
我最近把它升级到了最新版本（从2.0），我感觉这和它有关系。
这是什么意思？我一无所知...
这是我的项目文件：
<Project DefaultTargets="Build" ToolsVersion="3.5" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<ProjectType>local</ProjectType>
<ProjectVersion>7.10.3077</ProjectVersion>
<SchemaVersion>2.0</SchemaVersion>
<ProjectGuid>{5810CBEF-671E-4845-BBE3-BC3470C3EE18}</ProjectGuid>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<AssemblyName>svchost</AssemblyName>
<DefaultClientScript>JScript</DefaultClientScript>
<DefaultHTMLPageLayout>Grid</DefaultHTMLPageLayout>
<DefaultTargetSchema>IE50</DefaultTargetSchema>
<DelaySign>false</DelaySign>
<OutputType>Exe</OutputType>
<FileUpgradeFlags>
</FileUpgradeFlags>
<MyType>Console</MyType>
<UpgradeBackupLocation>
</UpgradeBackupLocation>
<OldToolsVersion>0.0</OldToolsVersion>
<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
<IsWebBootstrapper>false</IsWebBootstrapper>
<PublishUrl>publish\</PublishUrl>
<Install>true</Install>
<InstallFrom>Disk</InstallFrom>
<UpdateEnabled>false</UpdateEnabled>
<UpdateMode>Foreground</UpdateMode>
<UpdateInterval>7</UpdateInterval>
<UpdateIntervalUnits>Days</UpdateIntervalUnits>
<UpdatePeriodically>false</UpdatePeriodically>
<UpdateRequired>false</UpdateRequired>
<MapFileExtensions>true</MapFileExtensions>
<ApplicationRevision>0</ApplicationRevision>
<ApplicationVersion>1.0.0.%2a</ApplicationVersion>
<UseApplicationTrust>false</UseApplicationTrust>
<BootstrapperEnabled>true</BootstrapperEnabled>
<StartupObject>Sub Main</StartupObject>
<ApplicationManifest>My Project\app.manifest</ApplicationManifest>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<OutputPath>bin\Debug\</OutputPath> …