I have an application which is developed in 4.8 framework and another application .NET 8.0. The one in 4.8 is where I am developing the API’s and consuming in the other project. I added this in web.config but no luck. Initially I got it when I am using a GET call but after adding this it was good. But the same is not working for POST call so can some one let me know what changes I need to do

<customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    <add name="Access-Control-Allow-Headers" value="Content-Type" />
    <add name="Access-Control-Allow-Methods" value="GET,POST,PUT,DELETE,OPTIONS" />
    <add name="Access-Control-Allow-Credentials" value="true" />
</customHeaders>

Here is my controller

public class CustomerController : ApiController
{
   [Route("api/process-all-ids")]
   [HttpPost]
   public async Task<IHttpActionResult> ProcessAllIds([FromBody] List<int> ids)
   {
   }
}