خطای No 'Access-Control-Allow-Origin'

Access to XMLHttpRequest at 'http://localhost:6063/marketing/Click_Log_OTP?u=15.200.011.112' from origin 'http://mysite.ir' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

solution : Add to web.config

preCondition="integratedMode,runtimeVersionv4.0"/>