Failed to execute 'setRequestHeader' on 'XMLHttpRequest': 'Access- Control - Allow - Methods' is not a valid HTTP header field name in angular

[rahul patil]

I am calling asp.net web service in angular but give an error Failed to execute 'setRequestHeader' on 'XMLHttpRequest': 'Access- Control - Allow - Methods' is not a valid HTTP header field name.

I create a service using this command in angular:

ng generate service backendservice  

below is my question 

https://stackoverflow.com/questions/63498466/failed-to-execute-setrequestheader-on-xmlhttprequest-access-control-all  

I am facing error last couple of days

https://i.stack.imgur.com/q3VJI.png 

https://i.stack.imgur.com/DG0Bj.png 

help