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Attachment.Size property

Returns an Integer (int in C#) value indicating the size (in bytes) of the attachment. Read-only.

Namespace:  Microsoft.Office.Interop.Outlook
Assembly:  Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)

[DispIdAttribute()]
int Size { get; }

Property value

Type: System.Int32

This information may not always be available for attachments. For example, on an S/MIME message, the actual attachment sizes are unknown until the attachment is extracted. In cases where the attachment size cannot be determined, this property returns 0.

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