构建失败，错误MT2101：无法解析引用'System.String [] System.String :: Split（System.Char，System.StringSplitOptions）'

Question

使用Microsoft托管的MacOS代理mac-os-10.14在Azure DevOps（以前为VSTS）上构建时失败。有什么想法吗？

Mac-Os14和我的Mac OS中安装的软件的区别如下：托管代理Mac-Os14：

VS for Mac：8.4.0Nuget：4.7.0Xcode最新版本：11.3.NET Core SDK 1.0.1 1.0.4 1.1.10 1.1.11 1.1.12 1.1.13 1.1.4 1.1.5 1.1.7 1.1.8 1.1.9 2.0.0 2.0.3 2.1.100 2.1.101 2.1 .102 2.1.103 2.1.104 2.1.105 2.1.2 2.1.200 2.1.201 2.1.202 2.1.300 2.1.301 2.1.302 2.1.4 2.1.400 2.1.401 2.1.402 2.1.403 2.1.500 2.1.502 2.1.503 2.1.504 2.1.505 2.2.100 2.2.101 2.2.102 2.2.103 2.2.104 2.2.105

我的Mac：

VS for Mac：8.4.1Nuget：5.3.0Xcode最新版本：11.3.1.NET Core SDKSDK：/usr/local/share/dotnet/sdk/3.1.100/SdksSDK版本：3.1.1003.0.1013.0.1002.1.7012.1.7002.1.5052.1.5042.1.302MSBuild SDK：/Library/Frameworks/Mono.framework/Versions/6.6.0/lib/mono/msbuild/Current/bin/Sdks

Visual Studio Mac环境

=== Visual Studio Community 2019 for Mac ===

Version 8.4.1 (build 4)
Installation UUID: 1b63757d-df76-44cf-be32-c4667c711155
    GTK+ 2.24.23 (Raleigh theme)
    Xamarin.Mac 5.16.1.25 (issue-7441-d16-3-vsmac / 881172e73)

    Package version: 606000155

=== Mono Framework MDK ===

Runtime:
    Mono 6.6.0.155 (2019-08/296a9afdb24) (64-bit)
    Package version: 606000155

=== Roslyn (Language Service) ===

3.4.0-beta4-19562-05+ff930dec4565e2bc424ad3bf3e22ecb20542c87d

=== NuGet ===

Version: 5.3.0.6192

=== .NET Core SDK ===

SDK: /usr/local/share/dotnet/sdk/3.1.100/Sdks
SDK Versions:
    3.1.100
    3.0.101
    3.0.100
    2.1.701
    2.1.700
    2.1.505
    2.1.504
    2.1.302
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.6.0/lib/mono/msbuild/Current/bin/Sdks

=== .NET Core Runtime ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
    3.1.0
    3.0.1
    3.0.0
    2.1.14
    2.1.13
    2.1.12
    2.1.11
    2.1.9
    2.1.8
    2.1.2

=== Xamarin.Profiler ===

Version: 1.6.12.26
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Updater ===

Version: 11

=== Apple Developer Tools ===

Xcode 11.3.1 (15715)
Build 11C504

=== Xamarin.Mac ===

Version: 6.10.0.17 (Visual Studio Community)
Hash: 5f802ef53
Branch: xcode11.3
Build date: 2020-01-07 11:53:06-0500

=== Xamarin.iOS ===

Version: 13.10.0.17 (Visual Studio Community)
Hash: 5f802ef53
Branch: xcode11.3
Build date: 2020-01-07 11:53:06-0500

=== Xamarin Designer ===

Version: 16.4.0.478
Hash: 95f0ab363
Branch: remotes/origin/d16-4
Build date: 2020-01-08 23:59:46 UTC

=== Xamarin.Android ===

Version: 10.1.3.7 (Visual Studio Community)
Commit: xamarin-android/d16-4/d66aed
Android SDK: /Users/name/Library/Developer/Xamarin/android-sdk-macosx
    Supported Android versions:
        None installed

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 28.0.2
SDK Build Tools Version: 28.0.3

Build Information: 
Mono: fd9f379
Java.Interop: xamarin/java.interop/d16-4@c4e569f
ProGuard: xamarin/proguard/master@905836d
SQLite: xamarin/sqlite/3.28.0@46204c4
Xamarin.Android Tools: xamarin/xamarin-android-tools/master@9f4ed4b

=== Microsoft Mobile OpenJDK ===

Java SDK: /Users/name/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25
1.8.0-25
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Android SDK Manager ===

Version: 16.4.0.9
Hash: 3f7256f
Branch: remotes/origin/d16-4
Build date: 2020-01-08 19:54:56 UTC

=== Android Device Manager ===

Version: 16.4.0.28
Hash: 68e9956
Branch: remotes/origin/d16-4
Build date: 2020-01-08 19:55:18 UTC

=== Xamarin Inspector ===

Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1

=== Build Information ===

Release ID: 804010004
Git revision: 5f675128315bd5886b283aa192b334a02bc8a758
Build date: 2020-01-10 13:54:46+00
Build branch: release-8.4
Xamarin extensions: 6e5c119bf1e7b092680c1491be659f152329f74e

=== Operating System ===

Mac OS X 10.14.6
Darwin 18.7.0 Darwin Kernel Version 18.7.0
    Tue Aug 20 16:57:14 PDT 2019
    root:xnu-4903.271.2~2/RELEASE_X86_64 x86_64

Answer 1

托管Mac上的默认Mono版本为5.12，这很可能导致此问题。向执行以下代码的管道的开头添加Bash脚本任务，为我解决了该问题。

/bin/bash -c "sudo $AGENT_HOMEDIRECTORY/scripts/select-xamarin-sdk.sh Latest"

/bin/bash -c "echo '##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]'/Applications/Xcode_11.2.1.app;sudo xcode-select --switch /Applications/Xcode_11.2.1.app/Contents/Developer"

希望有帮助！