Windows Forms: Metro Wait Form in C#

Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "MetroWaitForm" and then click OK

Step 2: Right click on your project select Manage NuGet Packages -> Search metro framework -> Install

Step 3: Design your metro form as below

Name your main form: frmMain

Name your wait form: frmWaitForm

Step 4: Add code to handle frmWaitForm

using System;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WaitFormDemo
{
    public partial class frmWaitForm : Form
    {
        public Action Worker { get; set; }
        public frmWaitForm(Action worker)
        {
            InitializeComponent();
            if (worker == null)
                throw new ArgumentNullException();
            Worker = worker;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            //Start new thread for waitform
            Task.Factory.StartNew(Worker).ContinueWith(t => { this.Close(); }, TaskScheduler.FromCurrentSynchronizationContext());
        }
    }
}

Add code to handle frmMain

using System;
using System.Threading;

namespace MetroWaitForm
{
    public partial class frmMain : MetroFramework.Forms.MetroForm
    {
        public frmMain()
        {
            InitializeComponent();
        }

        void Save()
        {
            //Only for demo
            for (int i = 0; i <= 100; i++)
            {
                Thread.Sleep(20);
                //Save data
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            //Open waitform dialog
            using (var waitForm = new frmWaitForm(Save))
            {
                waitForm.ShowDialog(this);
            }
        }
    }
}

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