This option tag is used to identify the target dialog header field extension. When used in a Require header field, it implies that the recipient needs to support the Target-Dialog header field. When used in a Supported header field, it implies that the sender of the message supports it. Defined in rfc 4538.

public const string tdialog

Public Const tdialog As String

public:
literal String^ tdialog

static val mutable tdialog: string