C# com DotNetCasClient no Visual Studio 2015 Community

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CTRL + K e D = Identar código

https://wiki.jasig.org/display/casc/.net+cas+client

1 - Adicionar o DotNetCasClient ao projeto, selecionando o Manage NuGet Packages
2 - Remova o nó
    <authentication mode="None"/>
3 - Edite o nó autentication:
    <authentication mode="Forms">
      <forms loginUrl="https://cas.example.com/cas/login" cookieless="UseCookies" />
    </authentication>
4 - Abrir o arquivo Web.config e editar o nó casClientConfig:
  <casClientConfig
    casServerLoginUrl="https://cas.example.com/cas/login"
    casServerUrlPrefix="https://cas.example.com/cas/"
    serverName="cas.example.com"
    notAuthorizedUrl="~/NotAuthorized.aspx"
    cookiesRequiredUrl="~/CookiesRequired.aspx"
    redirectAfterValidation="true"
    gateway="false"
    renew="false"
    singleSignOut="true"
    ticketTimeTolerance="5000"
    ticketValidatorName="Cas20"
    proxyTicketManager="CacheProxyTicketManager"
    serviceTicketManager="CacheServiceTicketManager"
    gatewayStatusCookieName="CasGatewayStatus"
  />