我试图在VS2017上使用nuget安装LinphoneSDK。安装过程中出现以下错误：
Severity Code Description Project File Line Suppression State
Error Could not install package 'LinphoneSDK 3.12.0.273'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.5', 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. 0
任何指针如何在VS 2017中使用nuget来安装linphone SDK？请指教