Question

I have this method, called (post back) by a LinkButton on client side, by an user:

protected void myOwnMethod_Click(object sender, EventArgs e)
{
    myObject.Word = "Word";
}

well, myObject must be already instantiate before, so it must be accesible here and after (at the Page_Load state).

In fact, instantiate it at Page_Load I get

“System.NullReferenceException: Object reference not set to an
instance of an object.”

Answer 1

If an object has to be recreated every postback, your best bet is to instantiate it in Page_Init

protected void Page_Init(object sender, EventArgs e)
{
    myObject = new MyObject();
}

Note: if the dynamically created object has/uses viewstate, it should be restored after Page_Init automatically. Eg: a textbox retains it’s value.