SPField.FromBaseType property
Gets a Boolean value that indicates whether the field derives from a base field type.
Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Syntax
'Declaration
Public ReadOnly Property FromBaseType As Boolean
Get
'Usage
Dim instance As SPField
Dim value As Boolean
value = instance.FromBaseType
public bool FromBaseType { get; }
Property value
Type: System.Boolean
true if the field derives from a base field type; otherwise, false.
Remarks
The base field types are defined in FLDTYPES.XML, which defines the default schema for lists. Every built-in list in a site inherits its schema from a base type. If the FromBaseType property returns true, the field cannot be converted to another field type, nor can it be deleted.
Tip
If you want to prevent a field from being modified or deleted, set the Sealed property to true.