How to detect if machine is joined to domain?

Question

How do I detect whether the machine is joined to an Active Directory domain (versus in Workgroup mode)?

Answer 1

Can also be called by using system.net

string domain = System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties().DomainName

If the domain string is empty the machine isn't bound.

Documentation on the property returned https://docs.microsoft.com/en-us/dotnet/api/system.net.networkinformation.ipglobalproperties.domainname?view=netframework-4.7.2#System_Net_NetworkInformation_IPGlobalProperties_DomainName