PREVENT C# APP FROM FREEZING

/ C# WPF / By

There are few ways we can prevent C# App from freezing

               
        Task.Factory.StartNew(() => longRunningTask(qrCodeAsSvg));

        void longRunningTask(string qrCodeAsSvg)
        {
            Thread.Sleep(2000);
            File.WriteAllText(@"D:QRCodeMyTest.svg", qrCodeAsSvg);
        }

However, using the above method you won’t be able change the property of any element (e.g Button)

        Task.Factory.StartNew(() => (btn_QR_Generate.Content = "Saving.."));

Here is another option in which I’m using async method

            //Else statement
            else
            {
                SvgQRCode qrCode = new SvgQRCode(qrCodeData);
                qrCodeAsSvg = qrCode.GetGraphic(20);
                //string path = @"D:\QRCode\MyTest.svg";
                //File.WriteAllText(path, qrCodeAsSvg);
                //MessageBox.Show("");
                
              //Calling async method
                SaveFile(qrCodeAsSvg);
            }
        }

        //global variable
        string qrCodeAsSvg;

        //async method
        private async void SaveFile(string qrCodeAsSvg)
        {
            var btn = QR_Generate.Content;
            QR_Generate.Content = "Saving...";
            await Task.Run(() => longRunningTask(qrCodeAsSvg));
            QR_Generate.Content = btn;
        }

        //Long running task wich is will responsible for freezing UI Or Main Task
        void longRunningTask(string qrCodeAsSvg)
        {
            Thread.Sleep(2000);
            File.WriteAllText(@"D:\QRCode\MyTest.svg", qrCodeAsSvg);
        }