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ASP.NET - Configuring Forms Authentication in web.config

Last Modified: 2019-10-01
I have an ASP.NET Web Site built in .NET 4.7 using C#. In my web.config, I have the following Forms authentication (see web.config below) with the "domain" attribute set to ".mydomain.com" for my Production environment. Is there a way to dynamically change its value (via C#)  based on the environment, such as QA, Staging, etc. For example, if (Request.Url.AbsoluteUri.StartsWith("http://qa")), then I want to change the value of the "domain" attribute to ".myqadomain.com", and  if (Request.Url.AbsoluteUri.StartsWith("http://staging")), change the value to ".mystagingdomaincom".

Here's the <authentication> section of my web.config:
    <authentication mode="Forms">
      <forms path="/" name="MyWebSite_Auth" loginUrl="~/login.aspx" defaultUrl="~/customers/Default.aspx" protection="All" slidingExpiration="true" domain=".mydomain.com" timeout="350" cookieless="UseCookies"/>

Please provide the necessary C# code to accomplish this.

Many thanks in advance.
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