ErrorMode.IgnoreAndContinue

Read the file dropping bad records

Another option is to ignore the errors and continue. Here is an example:

Input.txt

ALFKI|Alfreds Futterkiste|Maria Anders|SalesRepresentative
ANATR|Ana Trujillo Emparedados y helados|Ana Trujillo|NotInEnum
FRANR|France restauration|Carine Schmitt|MarketingManager
ANTON|Antonio Moreno Taquería|Antonio Moreno|Owner

Customers with Enum.cs

[DelimitedRecord("|")]
public class Customer
{
    public string CustomerID;
    public string CompanyName;
    public string ContactName;
    public CustomerTitle ContactTitle;
}

public enum CustomerTitle
{
    Owner,
    SalesRepresentative,
    MarketingManager
}

RunEngine.cs

var engine = new DelimitedFileEngine<Customer>();

// Switch error mode on
engine.ErrorManager.ErrorMode = ErrorMode.IgnoreAndContinue;

//  This fails with not in enumeration error
var customers = engine.ReadFile("Input.txt");

// This wont display anything, we have dropped it
foreach (var err in engine.ErrorManager.Errors) {
    Console.WriteLine();
    Console.WriteLine("Error on Line number: {0}", err.LineNumber);
    Console.WriteLine("Record causing the problem: {0}", err.RecordString);
    Console.WriteLine("Complete exception information: {0}", err.ExceptionInfo.ToString());
}

// This will display only 3 of the four records
foreach (var cust in customers)
    Console.WriteLine("Customer name {0} is a {1}", cust.ContactName, cust.ContactTitle);

Console

Customer name Maria Anders is a SalesRepresentative
Customer name Carine Schmitt is a MarketingManager
Customer name Antonio Moreno is a Owner