<span xmlns=''><h1>Sys.Component Event
        </h1><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ComponentClass/ComponentDisposingEvent.aspx'>disposing Event</a>
        </p><p>Raised when the <a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ComponentClass/ComponentDisposeMethod.aspx'>dispose</a> method of the current Component object is called.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ComponentClass/ComponentPropertyChangedEvent.aspx'>propertyChanged Event</a>
        </p><p>Raised when the <a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ComponentClass/ComponentRaisePropertyChangedMethod.aspx'>raisePropertyChanged</a> method of the current Component object is called.
        </p><h1>Sys.Application Event
        </h1><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ApplicationClass/SysApplicationInitEvent.aspx'>init Event</a>
        </p><p>Raised after all scripts have been loaded but before objects are created.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ApplicationClass/SysApplicationLoadEvent.aspx'>load Event</a>
        </p><p>Raised after all scripts have been loaded and after the objects in the application have been created and initialized.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys/ApplicationClass/SysApplicationUnloadEvent.aspx'>unload Event</a>
        </p><p>Raised before all objects in the client application are disposed.
        </p><h1>Sys.WebForms.PageRequestManager Event
        </h1><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys.WebForms/PageRequestManagerClass/PageRequestManagerBeginRequestEvent.aspx'>beginRequest Event</a>
        </p><p>Raised before processing of an asynchronous postback starts and the postback request is sent to the server.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys.WebForms/PageRequestManagerClass/PageRequestManagerEndRequestEvent.aspx'>endRequest Event</a>
        </p><p>Raised after an asynchronous postback is finished and control has been returned to the browser.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys.WebForms/PageRequestManagerClass/PageRequestManagerInitializeRequestEvent.aspx'>initializeRequest Event</a>
        </p><p>Raised during the initialization of the asynchronous postback.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys.WebForms/PageRequestManagerClass/PageRequestManagerPageLoadedEvent.aspx'>pageLoaded Event</a>
        </p><p>Raised after all content on the page is refreshed as the result of either a synchronous or an asynchronous postback.
        </p><p><a href='http://www.asp.net/AJAX/Documentation/Live/ClientReference/Sys.WebForms/PageRequestManagerClass/PageRequestManagerPageLoadingEvent.aspx'>pageLoading Event</a>
        </p><p>Raised after the response from the server to an asynchronous postback is received but before any content on the page is updated.
        </p></span>

        <p>Basic elements of programmer tests in Visual Studio® Team System ™ (vs. Nunit):
        </p>
        <ul>
        <li>
        TestClass (TestFixture)
        </li>
        <li>
        TestMethod (Test)
        </li>
        <li>
        TestInitialization (Setup)
        </li>
        <li>
        TestCleanup (TearDown)
        </li>
        <li>
        ClassInitialization (TestFixtureSetup)
        </li>
        <li>
        ClassCleanup (TestFixtureTearDown)
        </li>
        </ul>

        <p>
        Any fool can make things bigger, more complex, and more violent. It takes a touch of genius — and a lot of courage — to move in the opposite direction. ---Albert Einstein
        </p>

        <p>First you need to add an handler to the event OnAsyncPostBackError of scriptmanager

        <pre data-sub="prettyprint:_">
        private Label Label1;