Enable OPTIONS header for CORS on .NET Core Web API

Question

I solved this problem after not finding the solution on Stackoverflow, so I am sharing my problem here and the solution in an answer.

After enabling a cross domain p

Answer 1

I know it has been answered. Just answering with the updated information. So it would help others.

It is now built into the ASP.NET Core framework.

Just follow https://docs.microsoft.com/en-us/aspnet/core/security/cors

and replace

    app.UseCors(builder =>
   builder.WithOrigins("http://example.com"));

with

        app.UseCors(builder =>
       builder.WithOrigins("http://example.com")
              .AllowAnyHeader()
              .AllowAnyMethod()
              .AllowCredentials());