public Tag AddTag( String tagName )
{
var tag = GetTagIdByName( tagName );
if (tag != null)
return tag;
var newTag = new Tag {name = tagName};
db.Tags.InsertOnSubmit( newTag );
db.SubmitChanges();
return newTag;
}
partial void UpdateTag(Tag instance);
partial void DeleteTag(Tag instance);
partial void InsertTag(Tag instance);