This exception is thrown when incorrectly attempting to create or access a DataRelation object. For example, if you attempt to remove a DataRelation when a corresponding ForeignKeyConstraint exists on a table, or if you try to specify DataRelation parent-and-child columns with incompatible data types or in tables from different DataSet objects, this exception is thrown.

public class InvalidConstraintException : DataException {
// Public Constructors
   public InvalidConstraintException(  );  
   public InvalidConstraintException( string s);  
// Protected Constructors
   protected InvalidConstraintException(System.Runtime.Serialization.SerializationInfo info,
        System.Runtime.Serialization.StreamingContext context);
}

Hierarchy

System.Object System.Exception(System.Runtime.Serialization.ISerializable) System.SystemException DataException InvalidConstraintException