Dev CSharp AsyncCallback.md

Dev C# Control.BeginInvoke (Delegate, Object[])

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https://msdn.microsoft.com/ru-ru/library/a06c0dc2(v=vs.110).aspx

foreach (var item in ribbonControl.Items) { if (item is BarButtonItem) { var barButtonItem = item as BarButtonItem; if (barButtonItem.Name == barButtonItemRefresh.Name) { // } } }

IAsyncResult and methods BeginInvoke/EndInvoke https://metanit.com/sharp/tutorial/13.2.php

using System; using System.Threading; namespace AsyncApp { public delegate int DisplayHandler(int k);

class Program
{
    static void Main(string[] args)
    {
        DisplayHandler handler = new DisplayHandler(Display);
        IAsyncResult resultObj = handler.BeginInvoke(10, new AsyncCallback(AsyncCompleted), "Asynchronous calls");
        Console.WriteLine("Main method continues to work");
        int res = handler.EndInvoke(resultObj);
        Console.WriteLine("Result: {0}", res);
        Console.ReadLine();
    }

    static int Display(int k)
    {
        Console.WriteLine("The Display method begins...");

        int result = 0;
        for (int i = 1; i < 10; i++)
        {
            result += k * i;
        }
        Thread.Sleep(3000);
        Console.WriteLine("Display method completes.");
       return result;
    }

    static void AsyncCompleted(IAsyncResult resObj)
    {
        string mes = (string)resObj.AsyncState;
        Console.WriteLine(mes);
        Console.WriteLine("Asynchronous delegate completed.");
    }
}

}