C# current.principal

In a current C# 2008 application, the current logic determines if a user has access to certain roles by using the following kind of check:
IPrincipal ip = Thread.CurrentPrincipal;
bool isInRole = ip.IsInRole("managers");

Now my company is going to use several different domains. For the logic
I listed above, would I need to use logic like
if (ip.IsInRole("domainname1/managers") ||
ip.IsInRole("domainname2/managers") ||
ip.IsInRole("domainname3/managers"))

,can I use logic that does not require the domain name, or do you have a suggestion on what I can try?
Thus can you show me in code or tell me how to accomplish my goal?

If your roles are going to be prefixed with domain names and you want to know whether a user is in a specific role in any domain, then it will make life easier if you write a custom method to check this and also (optionally) to return the domain the user is in:

static bool IsInRoleInAnyDomain(IPrincipal ip, string role, out string domain)

{

string[] domains = {"domainname1", "domainname2", "domainname3"};

foreach(string d in domains)

{

string domainRole = String.Format("{0}/{1}", d, role);

if (ip.IsInRole(domainRole))

{

domain = d;

return true;

}

domain = null;

return false;

}

You can then call this method with code such as the following:

string domain;

IPrincipal ip = Thread.CurrentPrincipal;

string role = "managers";

if (IsInRoleInAnyDomain(ip, role, out domain))

{

// do something

}