Describe the bug

Please provide as much information as you can.
Type program

using System;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

public class Program
{
  public static async Task Main()
  {
    await new HttpClient().GetAsync("http://github.com/");
  }
}

Did this error occur while using dotnet try or online?

• dotnet-try
• online

What kind of error was it?

• User Interface (UI): For example the output never displayed
• Service Error: For example "The service is temporarily unavailable. We are working on it"
• Other: Page freeze with high cpu usage
  
  

Screenshots

If applicable, add screenshots to help explain your problem.

Please complete the following:

• OS
  • Windows 10
  • macOS
  • Linux (Please specify distro)
  • iOS
  • Android
• Browser
  • Chrome
  • Edge
  • Safari