private static string GetLocalUserGroupName()
{
var user_name = new StringBuilder();
var domain_name = new StringBuilder();
user_name.EnsureCapacity(128);
domain_name.EnsureCapacity(128);
var user_size = (uint)user_name.Capacity;
var domain_size = (uint)domain_name.Capacity;
// Build SID S-1-5-32-545 (“Users” group)
byte[] sid = new byte[]
{
1, // Revision
2, // SubAuthorityCount
0, 0, 0, 0, 0, 5, // IdentifierAuthority = SECURITY_NT_AUTHORITY (5)
32, 0, 0, 0, // SECURITY_BUILTIN_DOMAIN_RID (32)
33, 2, 0, 0, // DOMAIN_ALIAS_RID_USERS (545)
};
if (!NativeMethods.LookupAccountSid(null, sid, user_name, ref user_size, domain_name,
ref domain_size, out SID_NAME_USE sid_use))
{
return(@"BUILTIN\Users");
}
return($@"{domain_name}\{user_name}");
}