NotesDatabase notedb = notesSession.GetDatabase(myrootpath, myDBfilename);
NotesDocumentCollection notesColl = notedb.AllDocuments;
if (notesColl.Count > 0)
{
    NotesDocument doc = notesColl.GetFirstDocument();
    try
    {
        while (doc != null)
        {
            if (doc.Items != null)
            {
                foreach (Domino.NotesItem item in doc.Items)
                {
                    if (item.Values != null)
                    {
                        switch (item.Name)
                        {
                            //PDB DATA
                            case "DocArea": pdbdoc.DocArea = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocDisc": pdbdoc.DocDisc = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocObject": pdbdoc.DocObject = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocOrigin": pdbdoc.DocOrigin = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocRef": pdbdoc.DocRef = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocRefClient": pdbdoc.DocRefClient = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocRevDt": pdbdoc.DocRevDt = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocRevNo": pdbdoc.DocRevNo = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocTitle": pdbdoc.DocTitle = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocUnit": pdbdoc.DocUnit = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "INCABINET": pdbdoc.InCabinet = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            //VDB DATA
                            case "VendorDocNm": pdbdoc.DocTitle = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "VendorDocRef": pdbdoc.DocRefClient = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "VendorDocRevNo": pdbdoc.DocRevNo = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "DocUse": pdbdoc.DocObject = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "VendorDocRevDt": pdbdoc.DocRevDt = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "VendorDocClientRef": pdbdoc.DocRef = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                            case "VendorNm": pdbdoc.VendorName = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
                        }
                    }
                }
            }
            doc = notesColl.GetNextDocument(doc);
        }
    }
    catch (Exception ex)
    {
        //Exception handling
    }
}

var items
    from doc in notedb.AllDocuments.Where(doc => doc.Items != null)
    from item in doc.Items.Where(item => item.Values != null)
    select item;

foreach (var item in items)
{
    SetDocProperty(pdbdoc, item);
}

void SetDocProperty(SomeType pdbdoc, SomeOtherType item)
{
    switch (item.Name)
    {
        //PDB DATA
        case "DocArea": pdbdoc.DocArea = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocDisc": pdbdoc.DocDisc = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocObject": pdbdoc.DocObject = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocOrigin": pdbdoc.DocOrigin = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocRef": pdbdoc.DocRef = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocRefClient": pdbdoc.DocRefClient = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocRevDt": pdbdoc.DocRevDt = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocRevNo": pdbdoc.DocRevNo = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocTitle": pdbdoc.DocTitle = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocUnit": pdbdoc.DocUnit = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "INCABINET": pdbdoc.InCabinet = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        //VDB DATA
        case "VendorDocNm": pdbdoc.DocTitle = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "VendorDocRef": pdbdoc.DocRefClient = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "VendorDocRevNo": pdbdoc.DocRevNo = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "DocUse": pdbdoc.DocObject = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "VendorDocRevDt": pdbdoc.DocRevDt = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "VendorDocClientRef": pdbdoc.DocRef = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
        case "VendorNm": pdbdoc.VendorName = LotusUtils.LotusUtils.LotusItemToString(item.Values); break;
    }
}