Cannot convert from 'System.Web.Mvc.ModelStateDictionary' to 'Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary'

Question

When I try to build my WEB API project on MS VS 2015 I am getting an erroras shown below.

CS1503 Argument 3: cannot convert from 'System.Web.Mvc.ModelStateDictionary' to 'Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary'

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Answer 1

In your project you are using System.Web.ModelBinding so please change it to using System.Web.Mvc;