Non-invocable member 'System.Configuration.ConfigurationManager.AppSettings' cannot be used like a method.

Non-invocable member 'System.Configuration.ConfigurationManager.AppSettings' cannot be used like a method.

Web.config file code:

<appSettings>

    <!-- Custom settings for application -->

    <add key="AppName" value="askdotnet.com" />

    <add key="AppTitle" value="Welcome to askdotnet.com" />

    <add key="AUTHORIZE_NET_API_LOGIN" value="http://askdotnet.com" />

    <add key="ServicesServer" value="http://askdotnet.com" />

    <add key="XBEServer" value="http://askdotnet.com" />

  </appSettings>

cs page code:

Error no 1.

Non-invocable member 'System.Configuration.ConfigurationManager.AppSettings' cannot be used like a method.

Issue no 1.

strAuthorizeNet_x_login = System.Configuration.ConfigurationManager.AppSettings("AUTHORIZE_NET_API_LOGIN");

Solutions no 1:

strAuthorizeNet_x_login = System.Configuration.ConfigurationManager.AppSettings["AUTHORIZE_NET_API_LOGIN"];

Error no 2.

This method is absolete....

Issue no 2.

strAuthorizeNet_x_login = System.Configuration.ConfigurationSettings.AppSettings("AUTHORIZE_NET_API_LOGIN");

Solutions no 2:

strAuthorizeNet_x_login = System.Configuration.ConfigurationManager.AppSettings["AUTHORIZE_NET_API_LOGIN"];