async in sync

AsyncHelper.cs

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // this will deadlock:
            // var message = GetMessageAsync().Result;
            // label1.Text = message;

            // this will not deadlock... in most cases. use with caution.
            var message = AsyncHelper.RunSync(GetMessageAsync);
            label1.Text = message;
        }

        private static async Task<string> GetMessageAsync()
        {
            await Task.Delay(200);
            return "hello!";
        }
    }

    internal static class AsyncHelper
    {
        private static readonly TaskFactory _myTaskFactory = new TaskFactory(
            CancellationToken.None,
            TaskCreationOptions.None,
            TaskContinuationOptions.None,
            TaskScheduler.Default);

        public static TResult RunSync<TResult>(Func<Task<TResult>> func)
        {
            return _myTaskFactory
                .StartNew(func)
                .Unwrap()
                .GetAwaiter()
                .GetResult();
        }

        public static void RunSync(Func<Task> func)
        {
            _myTaskFactory
                .StartNew(func)
                .Unwrap()
                .GetAwaiter()
                .GetResult();
        }
    }
}