CORS endpoints on asp.net Webforms [WebMethod] endpoints

Question

I am trying to add some [WebMethod] annotated endpoint functions to a Webforms style web app (.aspx and .asmx).

I\'d like to annotate those endpoints w

Answer 1

For the web form, you can use

Response.AddHeader("Access-Control-Allow-Origin", "*");

instead of

Response.AppendHeader("Access-Control-Allow-Origin", "*");

The first one works for old version of ASP.Net Web Form.