Create NUGET package to support Both Asp.Net MVC and Asp.Net core MVC

I have created the library project with TragetFramework is .NetFramework 4.5

I released the library project as Nuget package. By using this Nuget package developer can able to Create Razor Html control in Asp.Net MVC project. This is working as we expected.

My problem is now I want to support Asp.Net core MVC project also. How can I create NUGET package to support Both Asp.Net MVC and Asp.Net core MVC.