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POparallel.foreach with custom collection
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copied!<p>I am extending the <code>System.Net.Mail.MailAddress</code> class to include an ID field, so I created a new custom <code>MailAddress</code> class that inherited from the existing class and a new custom <code>MailAddressCollection</code> class. I then overrode the existing <code>System.Net.Mail.MailMessage.To</code> to use my new collection. </p> <p>I would like to process the recipients in parallel, but I can't get the syntax right. This is the syntax I am using.</p> <pre><code>Parallel.ForEach(EmailMessage.To, (MailAddress address) => { emailService.InsertRecipient(emailId, address.DisplayName, address.Address, " "); }); </code></pre> <p>I get the following errors:</p> <blockquote> <p>The best overloaded method match for 'System.Threading.Tasks.Parallel.ForEach(System.Collections.Generic.IEnumerable, System.Action)' has some invalid arguments </p> <p>Argument 1: cannot convert from 'EmailService.MailAddressCollection' to 'System.Collections.Generic.IEnumerable'</p> </blockquote> <p>What syntax do I need to use custom collections?</p> <p>Here is the EmailService.MailAddress class:</p> <pre><code>public class MailAddress : System.Net.Mail.MailAddress { /// <summary> /// Contains an identifier of the address for use in sending unique email links. /// </summary> public string ID = ""; public MailAddress(string Address) : base(Address) { } public MailAddress(string Address, string Name): base(Address, Name) { } public MailAddress(string Address, string Name, string Id) : base(Address, Name) { ID = Id; } } </code></pre>

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