public OrderCaptureInfo Capture()

class MyPage : System.Web.UI.Page
{
   private void AJAXCapture()
   {
       //Get OrderID
       string orderID = Base.Request("CaptureOrderID");
       if (string.IsNullOrEmpty(orderID))
       {
           return;
       }

       //Get Order
       Order order = Order.Create(orderID);
       if (string.IsNullOrEmpty(order.ID))
       {
           return;
       }

       //Capture
       OrderCaptureInfo result = order.Capture();

       //Write json
       if (result != null)
       {
           StringBuilder json = new StringBuilder();
           json.Append("{");
           json.AppendFormat("\"orderCaptureState\" : \"{0}\",", result.State.ToString());
           json.AppendFormat("\"orderCaptureInfoDate\" : \"{0}\",", result.CaptureTime.ToString("ddd, dd MMM yyyy HH:mm", Base.GetCulture(false)));
           json.AppendFormat("\"orderCaptureMessage\" : \"{0}\",", result.Message);
           json.AppendFormat("\"orderCaptureSupported\" : true");
           json.Append("}");

           //Write to response
           Response.Write(json.ToString());
       }
   }
}