26.3 Collections Reference


PropertyCollection props = Constraint.ExtendedProperties;

Contains a PropertyCollection that can store any amount of miscellaneous information about the Constraint. The information in the ExtendedProperties collection is for use by your code only; it isn't used by the .NET framework.

The ProperyCollection is derived from the Hashtable class. Most disconnected data objects provide an ExtendedProperties collection, including the DataSet, DataColumn, DataTable, and DataRelation classes.


The following code snippet stores the name of a DataRelation object that relates to a ForeignKeyConstraint:

fkc.ExtendedProperties["RelationName"] = dr.RelationName;


Items in the PropertyCollection must be strings if you want them to persist when the DataSet is written to XML.

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