this.bckgrndWorker = new System.ComponentModel.BackgroundWorker();
            this.bckgrndWorker.WorkerReportsProgress = true;
            this.bckgrndWorker.DoWork += new System.ComponentModel.DoWorkEventHandler(this.bckgrndWorker_DoWork);
            this.bckgrndWorker.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(this.bckgrndWorker_ProgressChanged);
            this.bckgrndWorker.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(this.bckgrndWorker_RunWorkerCompleted);

private static void Main()
{
    var worker = new BackgroundWorker();
    worker.WorkerReportsProgress = true;
    worker.DoWork += WorkerOnDoWork;
    worker.RunWorkerCompleted += WorkerOnRunWorkerCompleted;
    worker.ProgressChanged += WorkerOnProgressChanged;
    worker.RunWorkerAsync();
    Console.ReadLine();
}

private static void WorkerOnProgressChanged(object sender, ProgressChangedEventArgs e)
{
    Console.WriteLine("WorkerOnProgressChanged");
}

private static void WorkerOnRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    Console.WriteLine("WorkerOnRunWorkerCompleted");
}

private static void WorkerOnDoWork(object sender, DoWorkEventArgs e)
{
    Console.WriteLine("WorkerOnDoWork");
    var worker = sender as BackgroundWorker;
    worker?.ReportProgress(1);
    Thread.Sleep(2000);
}