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ContentId Property
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AttachmentBase.ContentId Property

Gets or sets the MIME content ID for this attachment.

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

public string ContentId { get; set; }

Property Value

Type: System.String
A String holding the content ID.

ExceptionCondition
ArgumentNullException

Attempted to set ContentId to null.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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