Run async method as sync

AsyncHelper.cs

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

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



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

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

        public static void RunSyncWithDispatcher(Func<Task> func)
        {
            DispatcherFrame frame = new DispatcherFrame();
            TaskFactory
                .StartNew(func)
                .Unwrap()
                .GetAwaiter()
                .OnCompleted(() => frame.Continue = false);

            Dispatcher.PushFrame(frame);
        }

        public static TResult RunSyncWithDispatcher<TResult>(Func<Task<TResult>> func)
        {
            DispatcherFrame frame = new DispatcherFrame();
            var awaiter = TaskFactory
                .StartNew(func)
                .Unwrap()
                .GetAwaiter();

            awaiter.OnCompleted(() => frame.Continue = false);

            Dispatcher.PushFrame(frame);

            return awaiter.GetResult();
        }

    }
}