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Attachment Constructor (String)

Note: This constructor is new in the .NET Framework version 2.0.

Initializes a new instance of the Attachment class with the specified content string.

Namespace: System.Net.Mail
Assembly: System (in system.dll)

public Attachment (
	string fileName
public Attachment (
	String fileName
public function Attachment (
	fileName : String



A String that contains a file path to use to create this attachment.

Exception typeCondition


fileName is a null reference (Nothing in Visual Basic).


fileName is empty.

The properties are set as follows:

The following code example demonstrates how to call this constructor.

public static void CreateMessageInlineAttachment2(string server, string
    // Create a message and set up the recipients.
    MailMessage message = new MailMessage(
       "A text message for you.",
       "Message: ");

    // Attach the message string to this e-mail message.
    Attachment data = new Attachment(textMessage);
    // Send textMessage as part of the e-mail body.
    ContentType content = data.ContentType;
    content.MediaType = MediaTypeNames.Text.Plain;
    //Send the message.
    // Include credentials if the server requires them.
    SmtpClient client = new SmtpClient(server);
    client.Credentials = CredentialCache.DefaultNetworkCredentials;

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0