C#

using (StreamReader outputLastNames = new StreamReader("lastnames.txt"))
            {
                for (int i = 0; i < vehicleCountInt; i++)
                {
                    arrayOfLastNames[i] = outputLastNames.ReadLine();
                    convertedLastName[i] = Int32.Parse(arrayOfLastNames[i]);//this is the part that causes the error
                }
            }

<code>
public class Contract
{
    public int ContractID {get;set;}
    public int CustomerID {get;set;}
    public string CustomerName {get;set;}
    public string Organization {get;set;}
    public int TermsID {get;}
}
//Then data mapper
public class ContractDataMapper
{
    public static List<Contract> GetContractData(int contractID)
    {
        List<Contract> returnValue = new List<Contract>();
        ... /*data retrieval logic*/
        while(reader.Read())
        {
            Contract contract = new Contract();
            contract.CustomerID = Convert.ToInt32(reader["CustomerID"]);
            contract.CustomerName = reader["CustomerName"].ToString();
            ...
            if(!returnValue.Contains(contract))
                returnValue.Add(contract);
        }
        reader.Close();
        command.Dispose();
        return returnValue();
    }
}
</code>

if(ContractDataMapper.GetContractData(1234)[0].TermsID > 0)
    // Do something

// Something like this
Contract contract = new Contract(1234);
List<SubsetData> subset = contract.SubsetData;