public void AddEmailAddresses(MailAddressCollection collection, string input)
{
if (!string.IsNullOrEmpty(input))
{
string[] addresses = input.Replace(";", "\r\n").Replace("\r\n", "\n").Replace("\r", "\n").Split('\n');
foreach (string address in addresses)
{
if (!string.IsNullOrWhiteSpace(address)) collection.Add(address);
}
}
}