This exception is thrown if you attempt an action that violates a
constraint or if you try to apply a constraint to a
DataTable that contains rows that violate it. For
example, you might try to create more than one row with the same
value in a unique column or a child record that references a
nonexistent parent.
public class ConstraintException : DataException {
// Public Constructors
public ConstraintException( );
public ConstraintException(string s);
// Protected Constructors
protected ConstraintException(System.Runtime.Serialization.SerializationInfo info,
System.Runtime.Serialization.StreamingContext context);
}