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IsBuiltInFieldDisallowingUniqueness method
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SPUtility.IsBuiltInFieldDisallowingUniqueness method

Returns a Boolean value that indicates whether a field is one of the special system fields that are not allowed to have the EnforceUniqueValues property set to false.

Namespace:  Microsoft.SharePoint.Utilities
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

public static bool IsBuiltInFieldDisallowingUniqueness(
	Guid fieldId


Type: System.Guid

The value of the field’s Id property.

Return value

Type: System.Boolean
true if the field is not allowed to force unique values.
© 2015 Microsoft