UndeleteMessageCompleted Event

public event AsyncCompletedEventHandler UndeleteMessageCompleted

Public Event UndeleteMessageCompleted AsyncCompletedEventHandler

public:
 event AsyncCompletedEventHandler^ UndeleteMessageCompleted

Connect to an IMAP server and asynchronously undelete messages that were flagged as DELETED (Task-based asynchronous approach).

using System;
using ComponentPro.Net.Mail;

...

// Create a new instance of the Imap class.
Imap client = new Imap();

// Connect to the server.
client.Connect("myserver");

// Or you can specify the IMAP port with 
// client.Connect("myserver", 143); 
 
// Login to the server.
client.Authenticate("user", "password");

// ... 
 
// Select 'INBOX' mailbox.
client.Select("INBOX");

// ... 

ImapMessageIdCollection set = new ImapMessageIdCollection(1, 2, 3);

// Delete mail messages with sequence numbers 1, 2, and 3.
client.DeleteMessage(set);

// ... 
 
// You have deleted the messages and now you wish to undelete them. 
 
// Undelete the messages. 
await client.UndeleteMessageAsync(set);

// ...

Console.WriteLine("Messages undeleted successfully.");

// Disconnect.
client.Disconnect();

Imports ComponentPro.Net.Mail

...

' Create a new instance of the Imap class. 
Dim client As New Imap()

' Connect to the server.
client.Connect("myserver")

' Or you can specify the IMAP port with 
' client.Connect("myserver", 143); 
 
' Login to the server.
client.Authenticate("user", "password")

' ... 
 
' Select 'INBOX' mailbox.
client.Select("INBOX")

' ...  
 
Dim [set] As New ImapMessageIdCollection(1, 2, 3)

' Delete mail messages with sequence numbers 1, 2, and 3.
client.DeleteMessage([set])

' ... 
 
' You have deleted the messages and now you wish to undelete them. 
 
' Undelete the messages. 
Await client.UndeleteMessageAsync([set])

' ...

Console.WriteLine("Messages undeleted successfully.")

' Disconnect.
client.Disconnect()

Connect to an IMAP server and asynchronously undelete messages that were flagged as DELETED (Event-based asynchronous approach).

using System;
using System.ComponentModel;
using ComponentPro;
using ComponentPro.Net.Mail;

...

public void DoUndeleteMessagesAsync()
{
    // Create a new instance of the Imap class. 
    Imap client = new Imap();

    // Connect to the server. 
    client.Connect("myserver");

    // Or you can specify the IMAP port with 
    // client.Connect("myserver", 143); 
 
    // Login to the server. 
    client.Authenticate("user", "password");

    // ... 
 
    // Register an event handler. 
    client.UndeleteMessageCompleted += client_UndeleteMessageCompleted;

    // Select 'INBOX' mailbox. 
    client.Select("INBOX");

    // ...  
 
    ImapMessageIdCollection set = new ImapMessageIdCollection(1, 2, 3);

    // Delete mail messages with sequence numbers 1, 2, and 3. 
    client.DeleteMessage(set);

    // ... 
 
    // You have deleted the messages and now you wish to undelete them. 
 
    // Undelete the messages. 
    client.UndeleteMessageAsync(set);

    // ... 
 
    // Disconnect. 
    client.Disconnect();
}

void client_UndeleteMessageCompleted(object sender, AsyncCompletedEventArgs e)
{
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
    }
    else 
    {
        Console.WriteLine("Messages undeleted successfully.");
    }
}

Imports System.ComponentModel
Imports ComponentPro
Imports ComponentPro.Net.Mail

...

Public Sub DoUndeleteMessagesAsync()
    ' Create a new instance of the Imap class. 
    Dim client As New Imap()

    ' Connect to the server. 
    client.Connect("myserver")

    ' Or you can specify the IMAP port with 
    ' client.Connect("myserver", 143); 
 
    ' Login to the server. 
    client.Authenticate("user", "password")

    ' ... 
 
    ' Register an event handler. 
    AddHandler client.UndeleteMessageCompleted, AddressOf client_UndeleteMessageCompleted

    ' Select 'INBOX' mailbox. 
    client.Select("INBOX")

    ' ...  
 
    Dim [set] As New ImapMessageIdCollection(1, 2, 3)

    ' Delete mail messages with sequence numbers 1, 2, and 3. 
    client.DeleteMessage([set])

    ' ... 
 
    ' You have deleted the messages and now you wish to undelete them. 
 
    ' Undelete the messages. 
    client.UndeleteMessageAsync([set])

    ' ... 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Sub client_UndeleteMessageCompleted(ByVal sender As Object, ByVal e As AsyncCompletedEventArgs)
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
    Else 
        Console.WriteLine("Messages undeleted successfully.")
    End If 
End Sub

Reference