App Settings .Net Core

Question

I am trying to add an appsettings.json and followed a lot of tutorials and still can not do it.

I create appsettings.json

{
  \"option1\": \"value1_f         


        

Answer 1

Did you include the correct namespace?

using Microsoft.Extensions.DependencyInjection;

Also did you have a reference to?:

Microsoft.Extensions.Options.ConfigurationExtensions

In above Assembly we have:

public static IServiceCollection Configure(this IServiceCollection services, IConfiguration config) where TOptions : class;

Most probably you are using the extension method from Microsoft.Extensions.Options assembly (which is wrong)

public static IServiceCollection Configure(this IServiceCollection services, Action configureOptions) where TOptions : class;