How to resolve [msbuild] Microsoft.CSharp.Core.targets was not found

I am using xcode version 10, visual studio 2017, mac os Mojave. while building the application getting the Error:---
VisualStudio/7.0/MSBuild/9435_1/Microsoft.CSharp.CurrentVersion.targets(5,5): Error MSB4019: The imported project VisualStudio/7.0/MSBuild/9435_1//Microsoft.CSharp.Core.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk. (MSB4019). Any suggestions please ?