_MobileItem.To Property
Office 2010
Returns or sets a semicolon-delimited String (string in C#) list of display names for the To recipients for the MobileItem object. Read/write.
Assembly: Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)
The To property corresponds to the MAPI PidTagDisplayTo Canonical Property property. This property contains the display names only. Recipients can be specified as mobile phone numbers. Use the Recipients property to modify this property.