title: Web Forms send text from textbox to method onChange event
body: <p>I'm new in web forms. I need to send text from <code>aspx</code> page to server method using <code>onChange</code> in this <code>textbox</code>: </p>
  
  <pre><code>Email:
      &lt;asp:TextBox ID="FilterAccountsTextBox" runat="server"/&gt;
  </code></pre>
  
  <p>May anyone help me? </p>