namespace DSInternals.Common
{
    using System;
    using System.Net;

    public static class NetworkCredentialExtensions
    {
        /// <summary>
        /// Gets either UPN or Down-Level Logon Name
        /// </summary>
        public static string GetLogonName(this NetworkCredential credential)
        {
            string logonName = null;

            if (credential != null)
            {
                if (String.IsNullOrEmpty(credential.Domain))
                {
                    // The domain is either not specified or the UserName already contains it in the form of a UPN.
                    logonName = credential.UserName;
                }
                else
                {
                    // Combine Domain with UserName.
                    logonName = String.Format(@"{0}\{1}", credential.Domain, credential.UserName);
                }
            }

            return logonName;
        }
    }
}