// set up domain context
PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
 
// find a user
// Unlocked account
UserPrincipal user = UserPrincipal.FindByIdentity(ctx, "myAccount");
if (user != null) {
    string displayName = user.DisplayName;
 
    if (user.IsAccountLockedOut()) {
        Console.WriteLine("{0} is locked.", displayName);
    }
    else {
        Console.WriteLine("{0} is unlocked.", displayName); // I am here
    }
}
 
// find a user
// Locked account
UserPrincipal user2 = UserPrincipal.FindByIdentity(ctx, "lockedUserAccount");
if (user2 != null) {
    string displayName2 = user2.DisplayName;
 
    if (user2.IsAccountLockedOut()) {
        Console.WriteLine("{0} is locked.", displayName2);
    }
    else {
        Console.WriteLine("{0} is unlocked.", displayName2); // Oops... I am here again
    }
}

// This way of account status checking is VERY SLOWLY for 
// big count of users...
using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain)) {
    using (UserPrincipal userPrincipal = UserPrincipal
        .FindByIdentity(ctx, account)) {
        isEnabled = userPrincipal.Enabled.Value;
    }
}

if (record.ContainsKey("useraccountcontrol") &&
    record["useraccountcontrol"].Count > 0) {
    isEnabled = (((Int32)record["useraccountcontrol"][0])
        & 2) == 0;
}

ConnectionOptions options = new ConnectionOptions();
// Username & Password are necessary when process hasn't admin rights.
options.Username = @"domainName\adminAccount";
options.Password = "adminPassword";

ManagementScope scope = new ManagementScope(@"\\remoteMachineName\root\cimv2",
    options);
ObjectQuery query = new ObjectQuery(
    "SELECT OSArchitecture FROM Win32_OperatingSystem");

using (ManagementObjectSearcher searcher =
    new ManagementObjectSearcher(scope, query))
using (ManagementObjectCollection queryCollection = searcher.Get()) {
    foreach (var item in queryCollection) {
        foreach (var prop in item.Properties) {
            Console.WriteLine("{0}: {1}", prop.Name, prop.Value); // OSArchitecture: 64-bit
        }
    }
}