Trouble with CORS Policy and .NET Core 3.1

Question

I\'m not sure what I\'m missing, but can\'t seem to get my CORS Policy working with .NET Core 3.1 and Angular 8 client-side.

Startup.cs:

Answer 1

When adding the Cors Service make sure to include .SetIsOriginAllowed((host) => true) after .WithOrigins("http://localhost:4200")

services.AddCors(options => {
            options.AddPolicy("mypolicy",builder => builder
            .WithOrigins("http://localhost:4200/")
            .SetIsOriginAllowed((host) => true)
            .AllowAnyMethod()
            .AllowAnyHeader());
  });