c# - Class library types for a web/mobile project -


i want develop .net core webapi , consuming services web (angular) , mobile(xamarin).

i use class library, i'am not understanding type of class library should use.

when tried use portable class library targeting .net framework 4.5, asp.net 1.0 , xamarin. can't install entity framework on project.

the simple class library not work xamarin. enter image description here


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