PIIdentities Class

public sealed class PIIdentities : IList<PIIdentity>, 
	ICollection<PIIdentity>, IEnumerable<PIIdentity>, IEnumerable, 
	IList, ICollection

// Get the PIIdentities from the PIServer on the local computer
PISystems myPISystems = new PISystems();
PISystem myPISystem = myPISystems.DefaultPISystem;
PIServer myPIServer = PIServer.FindPIServer(myPISystem, piServerName);

// Display information about each PIIdentity and its properties
PIIdentities identities = myPIServer.Identities;
Console.WriteLine("Found {0} identities", identities.Count);
foreach (PIIdentity identity in identities)
{
    Console.WriteLine(identity.Name);
    Console.WriteLine("  IdentityType: {0}", identity.IdentityType);
    Console.WriteLine("  Description: {0}", identity.Description);
    Console.WriteLine("  AllowExplicitLogin: {0}", identity.AllowExplicitLogin);
    Console.WriteLine("  AllowMappings: {0}", identity.AllowMappings);
    Console.WriteLine("  AllowTrusts: {0}", identity.AllowTrusts);
    Console.WriteLine("  IsEnabled: {0}", identity.IsEnabled);
    Console.WriteLine();
}

// Add an identity of PIIdentity type, if it does not yet exist.
string newIdName = "PIIdentityTestExample";
PIIdentity newId;
if (!identities.Contains(newIdName))
{
    // Note that adding or editing an identity requires 'CheckIn' in order to commit it to the PI Data Archive.
    newId = identities.Add(newIdName, PIIdentityType.PIIdentity);
    newId.CheckIn();
}
else 
    newId = identities[newIdName];

Console.WriteLine(newId.Name);
Console.WriteLine("  IdentityType: {0}", newId.IdentityType);
Console.WriteLine("  Description: {0}", newId.Description);
Console.WriteLine("  AllowExplicitLogin: {0}", newId.AllowExplicitLogin);
Console.WriteLine("  AllowMappings: {0}", newId.AllowMappings);
Console.WriteLine("  AllowTrusts: {0}", newId.AllowTrusts);
Console.WriteLine("  IsEnabled: {0}", newId.IsEnabled);
Console.WriteLine();

// Edit an identity.
newId.Description = "This is a PIIdentity for Test Example";
newId.CheckIn();

Console.WriteLine(newId.Name);
Console.WriteLine("  Description: {0}", newId.Description);
Console.WriteLine();

// Delete an identity. 
// Note that the 'Remove' call will be directly committed to the PI Data Archive.
identities.Remove(newId);