Common asynchronous delay methods

    /// <summary>    ///  define an event delegate that is signed with a method      /// </summary>    public delegate void  Asynceventhandler ();     /// <summary>    ///  defining callback method delegates with methods and signatures      /// </summary>    /// <param name= "EX" > Exception information Object </ Param>    public delegate void asynccallbackhandler (EXCEPTION&NBSP;EX);     /// <summary>    ///  Asynchronous call engine classes      /// </summary>    public class AsyncCallEngine     {        /// <summary>         ///  Execute asynchronous method call         /// </summary >  &nbSp;     /// <param name= "Asyncmethod" > Methods for asynchronous Execution </param>         /// <param name= "Callbackmethod" > Methods of asynchronous execution of methods after execution of callbacks < /param>        public static void process ( Asynceventhandler asyncmethod, asynccallbackhandler callbackmethod)          {            try             {                 //instantiation of Delegates and initial assignment                  AsyncEventHandler acd = new  Asynceventhandler (Asyncmethod);                 //Instantiate callback method and subscribe                 asynccallback acb  = new asynccallback (AR)  =>                 {                     //from asynchronous State ar. AsyncState, gets the delegate object                      acd =  (Asynceventhandler) ar. asyncstate;                     Exception _ex = null;                      try                     {                         //asynchronous completion, execution callback method                 &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;ACD. EndInvoke (AR);                     }                     catch  (Exception ex)                      {                          _ex = ex;                     }                     //Call callback function                      if   (Callbackmethod != null)                      {                         callbackmethod (_EX);                      }                } );                 //Asynchronous Start                  IAsyncResult  IAR&NBSP;=&NBSP;ACD. BeGininvoke (ACB,&NBSP;ACD);            }             catch  (Exception ex)              {                 //Call callback function                  if  (callbackmethod != null)                  {                     callbackmethod (ex);                 }             }        }          /// <summary>        ///  executing asynchronous method calls         /// </summary>         /// <param name= "Asyncmethod" > Methods for asynchronous Execution </param>         public static void process (Asynceventhandler asyncmethod)          {             Process (asyncmethod, null);         }    }

Common asynchronous delay methods