title: An unhandled exception occurred during the execution of the current web request. ASP.NET
body: <p>I just ran my program and I got this error message</p>
  
  <blockquote>
    <p>An unhandled exception occurred during the execution of the current
    web request. Please review the stack trace for more information about
    the error and where it originated in the code.</p>
  </blockquote>
  
  <p>with stack trace </p>
  
  <pre><code>[NullReferenceException: Object reference not set to an instance of an object.]
     OverseasCreditCard.Default.Page_Load(Object sender, EventArgs e) +667
     System.Web.UI.Control.LoadRecursive() +70
     System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3177
  </code></pre>
  
  <p>I am using ASP.NET C#, does anyone know what happened?</p>