Use of enums

Try to use enums as much as possible.

For example, instead of writing

public DocumentEntity CreateDocument (
    int documentTypeId)
{
    DocumentEntity document = new DocumentEntity ();
    document.DocumentTypeId = documentTypeId;
    return document;
}

use

public DocumentEntity CreateDocument (
    DocumentType documentType)
{
    DocumentEntity document = new DocumentEntity ();
    document.DocumentTypeId = (int)documentType;
    return document;
}

This holds for data accessors, remoting objects, etc.