新年结束后，我又回到办公室，开始更新我过去两个月写的Xamarin项目的软件包。
我得到了错误：
Could not install package 'Xamarin.Android.Support.Annotations 28.0.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.6.2', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
我该怎么办才能处理错误？