Inbuilt Dialogue for Win Application+WPF C#

To Show above progress dialogue in Windows WPF Application, you need to install MahApps.Metro theme then include

   using MahApps.Metro.Controls;
   using MahApps.Metro.Controls.Dialogs;

Also declare a global variable

                  private ProgressDialogController progress;

After this just call this below method to show or hide the progress dialogue

                  public async Task enableOrDisableWaitPopup(bool enable, string message="")

        {

            if(enable)

                progress = await this.ShowProgressAsync("Please wait...", message);

            else

                await progress.CloseAsync();

        }