CRUD in SharePoint Client Object Model

I want to create/read/update/delete list item via SharePoint Client Object Model using Microsoft.SharePoint.Client and Microsoft.SharePoint.Client.Runtime.

Create

using (ClientContext context = new ClientContext(url))
{
    //set credentials
    ICredentials cache = new NetworkCredential(userName, password);
    context.Credentials = cache;

    List barcodeReaderList = context.Web.Lists.GetByTitle(listName);
    ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
                
    ListItem item = barcodeReaderList.AddItem(itemCreateInfo);
    item["Title"] = barcode;
    item.Update();

    context.ExecuteQuery();
}

Update

using (ClientContext context = new ClientContext(url))
{
    //set credentials
    ICredentials cache = new NetworkCredential(userName, password, domain);
    context.Credentials = cache;

    List list = context.web.Lists.GetByTitle(listName);
    ListItem item = list.GetItemById(id);
    item["Title"] = title;

    item.Update();
    context.ExecuteQuery();
}

Delete

using (ClientContext context = new ClientContext(url))
{
    List list = context.Web.Lists.GetByTitle(listName);

    ListItem item = list.GetItemById(id);
    item.DeleteObject();

    context.ExecuteQuery();
}

Read

private IEnumerable newLists;

var dt = new DateTime(2010, 3, 20);
var query = from list
            in clientContext.Web.Lists
            where list.Created > dt && list.Hidden == false
            select list;

newLists = clientContext.LoadQuery(query);
clientContext.ExecuteQueryAsync(onPartQuerySucceeded, onPartQueryFailed);