var users = await User.FindAllAsync(UserType.LocalUser);
var user = (string) await users.FirstOrDefault().GetPropertyAsync(KnownUserProperties.AccountName);
var domain = "";
var host = "";

if (string.IsNullOrEmpty(user))
{
var domainWithUser = (string) await users.FirstOrDefault().GetPropertyAsync(KnownUserProperties.DomainName);
domain = domainWithUser.Split('\\')[0];
user = domainWithUser.Split('\\')[1];
}

这帮助了我.参考 http://codegur.com/33736983/get-environment-net-core-uwp中的变量