Run an Async Task Synchronously in the thread pool. This will not copy any thread context.

RunSynchronouslyInThreadPool

private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                //both methods do basically the same thing.
                //I recommend the first since it's much simpler. 
                
                var body = RunSynchronouslyInAnotherTask(GetBody);  // method 1
                //var body = RunSynchronouslyInThreadPool(GetBody); // method 2
                this.textBox1.Text = body;
            }
            catch (Exception ex)
            {
                this.textBox1.Text = ex.ToString();
            }
        }

private T RunSynchronouslyInAnotherTask<T>(Func<Task<T>> taskAction)
        {
            T result = default(T);
            Task.Run(async () => { result = await taskAction(); }).Wait();
            return result;
        }

private T RunSynchronouslyInThreadPool<T>(Func<Task<T>> taskAction)
        {
            using (var semaphore = new SemaphoreSlim(0, 1))
            {
                T result = default(T);
                Exception asyncException = null;
                ThreadPool.QueueUserWorkItem(o =>
                {
                    try
                    {
                        var task = taskAction();
                        result = task.Result;
                    }
                    catch (Exception exception)
                    {
                        asyncException = exception;
                    }
                    semaphore.Release();
                });
                semaphore.Wait(); //block until delegate is complete.
                if (asyncException != null)
                {
                    throw asyncException;
                }
                return result;
            }
        }
        
private async Task<string> GetBody()
        {
            var client = new HttpClient();
            //throw new ApplicationException("blah");
            var response = await client.GetAsync("http://www.google.com");

            var body = await response.Content.ReadAsStringAsync();
            return body;
        }