xamarin.android 调试时出现部署出错（There were deployment errors.Continue?）

xamarin.android调试时遇到 下述情况

详细信息如下：

Build started…
1>—— Build started: Project: XAndoridVm, Configuration: Debug Any CPU ——
1>C:/Users/ZX/source/repos/XAndoridVm/XAndoridVm/Properties/AndroidManifest.xml : warning XA4211: AndroidManifest.xml //uses-sdk/@android:targetSdkVersion ’30’ is less than $(TargetFrameworkVersion) ”. Using API-31 for ACW compilation.
1> XAndoridVm -> C:/Users/zx/source/repos/XAndoridVm/XAndoridVm/bin/Debug/XAndoridVm.dll
1>C:/Program Files/Microsoft Visual Studio/2022/Community/MSBuild/Xamarin/Android/Xamarin.Android.Legacy.targets(315,5): warning XA0122: Assembly ‘Xamarin.Android.Support.Annotations’ is using a deprecated attribute ‘[assembly: Java.Interop.DoNotPackageAttribute]’. Use a newer version of this NuGet package or notify the library author.
2>Starting deployment to OPPO PCRT00 …
2>Deploying to OPPO PCRT00 …
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Deploy: 0 succeeded, 1 failed, 0 skipped ==========

看了下上述的详细报错信息，怀疑是编译版本有问题，从第一条黄色信息看应该是目标版本可能高了（编译时使用的目标版本是12）。于是决定将编译目标版本调低看看……如下为调整地方。

将目标版本调整为android 9之后，测试成功。