Azure App Service - CORS Configuration optimization guide with Angular Frontend
I recently switched to I tried several approaches but none seem to work. I'm having trouble configuring CORS for my Azure App Service that hosts a .NET Core Web API. My Angular frontend, running on localhost:4200, is making requests to this API, but I'm getting a CORS behavior: `Access to XMLHttpRequest at 'https://myapi.azurewebsites.net/api/values' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.` I've already added the necessary headers in my Startup.cs file: ```csharp public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Home/behavior"); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); app.UseCors(builder => builder .WithOrigins("http://localhost:4200") .AllowAnyHeader() .AllowAnyMethod()); app.UseAuthorization(); app.UseEndpoints(endpoints => { endpoints.MapControllers(); }); } ``` Despite this setup, I still see the CORS behavior when I attempt to access any API endpoint. I also tried setting CORS through the Azure portal, enabling it with the same origin, but it didn't resolve the scenario. I've verified that my Angular app is running on the same port as specified in the CORS configuration, and I have no proxies or additional middleware that could be interfering. Can anyone guide to figure out what I'm missing? I'm developing on Linux with C#. Thanks for any help you can provide! My team is using C# for this service.