.netcore3.1 cross-domain settings

Original: .netcore3.1 cross-domain settings

1, all of the terminals can be called, as follows:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // Preceding code ommitted.
    app.UseRouting();

    app.UseCors();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });

    // Following code ommited.
}

By the end point routing, CORS middleware must be configured to be performed between calls to UseRouting and UseEndpoints of. Middleware is not configured correctly will lead to stop functioning properly.