SPBuiltInFieldId.Birthday Field
Identifies a field that contains the birth date that is associated with a person who is referenced by a specified SharePoint Foundation contact object.
Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
Syntax
'Declaration
Public Shared ReadOnly Birthday As Guid
'Usage
Dim value As Guid
value = SPBuiltInFieldId.Birthday
public static readonly Guid Birthday