Using OpenPop.dll in Sharepoint

Question

I'm using POP3 in sharepoint to read and count mails in my mail but i received error : "Could not load file or assembly 'OpenPop, Version=2.0.4.369, Culture=neutral, PublicKeyToken=bebb5741791313cd' or one of its dependencies. The system cannot find
the file specified."
Here 's my code :
HTML code
<div id="form1" runat="server">
Mail Server Name:
<asp:TextBox ID="txtMailServer" runat="server" />
<br />
UserName:
<asp:TextBox ID="txtUserName" runat="server" />
<br />
Password:
<asp:TextBox ID="txtPassword" runat="server" TextMode = "Password" />
<br />
Port:
<asp:TextBox ID="txtPort" runat="server" Text = "" />
<br />
SSL:
<asp:CheckBox ID="chkSSL" runat="server" />
<br />
<asp:Button ID="btnReadEmails" runat="server" Text="Read Emails" OnClick = "Read_Emails" />
<br /><hr />
<asp:GridView ID="gvEmails" runat="server" AutoGenerateColumns = "false">
<Columns>
    <asp:BoundField HeaderText = "From" DataField = "From" />
    <asp:HyperLinkField HeaderText = "Subject" DataNavigateUrlFields = "MessageNumber" DataNavigateUrlFormatString = "~/ShowMessageCS.aspx?MessageNumber={0}" DataTextField = "Subject" />
    <asp:BoundField HeaderText = "Date" DataField = "DateSent" />
</Columns>
</asp:GridView>
</div>
Code .cs
protected void Read_Emails(object sender, EventArgs e)
            try 
                Pop3Client pop3Client;
                if (Session["Pop3Client"] == null)
                    pop3Client = new Pop3Client();
                    pop3Client.Connect(txtMailServer.Text, int.Parse(txtPort.Text), chkSSL.Checked);
                    pop3Client.Authenticate(txtUserName.Text, txtPassword.Text);
                    Session["Pop3Client"] = pop3Client;
                else
                    pop3Client = (Pop3Client)Session["Pop3Client"];
                int count = pop3Client.GetMessageCount();
                DataTable dtMessages = new DataTable();
                dtMessages.Columns.Add("MessageNumber");
                dtMessages.Columns.Add("From");
                dtMessages.Columns.Add("Subject");
                dtMessages.Columns.Add("DateSent");
                int counter = 0;
                for (int i = count; i >= 1; i--)
                    Message message = pop3Client.GetMessage(i);
                    dtMessages.Rows.Add();
                    dtMessages.Rows[dtMessages.Rows.Count - 1]["MessageNumber"] = i;
                    dtMessages.Rows[dtMessages.Rows.Count - 1]["Subject"] = message.Headers.Subject;
                    dtMessages.Rows[dtMessages.Rows.Count - 1]["DateSent"] = message.Headers.DateSent;
                    counter++;
                    if (counter > 5)
                        break;
                gvEmails.DataSource = dtMessages;
                gvEmails.DataBind();
            catch { }

Answer 1

Hi,
This should help you
http://stackoverflow.com/questions/9999441/c-could-not-load-file-or-assembly-openpop-version-2-0-4-369-culture-neutral.
Verify that the assembly is signed, if you created your own assembly, sign it.
2) Install the DLL to the GAC using gacutil from SDK tools of Visual Studio (http://msdn.microsoft.com/en-us/library/dkkx7f79.aspx)
3) Reference the same DLL from your Script Task
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