First glance on my unofficial Windows Phone SDK for Azure Mobile Services

MobileServices_WindowsPhone.cs

// in App.xaml.cs
public partial class App : Application
{
    public static readonly MobileServiceClient MobileServiceClient;
    public static User CurrentUser;

    static App()
    {
        // Get this data from the management portal's quickstart page
        // in the 'connect to existing apps' section
        MobileServiceClient = new MobileServiceClient(
            "https://YOUR_APP.azure-mobile.net/",
            "YOUR_APP_KEY"
        );
    }
    
    // the rest of App.xaml.cs here ...
}

// elsewhere:
MobileServiceTable<TodoItem> todoItemTable = App.MobileServiceClient.GetTable<TodoItem>();


// insert
var item = new TodoItem { Text = "Do this!" };
todoItemTable.Insert(item, (res, err) => {
    if (err != null) {
        //handle it
        return;
    }
    item = res;
});


// Update (sorry, no typed version yet):
var updates = new JObject();
updates["text"] = "The text";
todoItemTable.Update(updates, err => {
    if (err != null) {
        //handle it
    }
});


// Get all
todoItemTable.GetAll((res, err) => {
    if (err != null) {
        //handle it
        return;
    }
    foreach (TodoItem in res) {
    }
});


// OData query
var query = new MobileServiceQuery()
    .Filter("text eq 'whatever'")
    .Top(1)
    .Skip(2)
    .OrderBy("id desc");

todoItemTable.Get(query, (res, err) => {
    if (err != null) {
        //handle it
        return;
    }
    foreach (TodoItem in res) {
    }
});


// delete
testStuffTable.Delete(item.Id, err => {
    if (err != null) {
        //handle it
    }
});


// login to Azure Mobile Services with the AuthenticationToken returned 
// from LiveAuthClient or the LiveLoginButton's SessionChanged event           
App.MobileServiceClient.Login(e.Session.AuthenticationToken, (userId, err) => {
   // do something with userId, perhaps call to LiveConnect for user details, etc.
});