2002-10-06 Luis Fernandez <luifer@onetel.net.uk>

2002-10-06  Luis Fernandez <luifer@onetel.net.uk>

	* System.Data/Constraint.cs (AssertConstraint): added overloaded
	method.

	* System.Data/DataColumnCollection.cs: added constraints when needed.

	* System.Data/DataRow.cs: validate UniqueConstraint's.

	* System.Data/DataRowCollection.cs (ValidateDataRowInternal): new
	internal method to validate a given DataRow with respect to the
	DataRowCollection.

	* System.Data/ForeignKeyConstraint.cs (AssertConstraint): stubs for
	new overloaded method.

	* System.Data/UniqueConstraint.cs: added implementation.
	(AseertConstraint): implemented new overloaded method.

svn path=/trunk/mcs/; revision=8038