Math.Round opens the browser print dialog (2019)
Math.Round opens the browser print dialog · Issue #290 · dotnet/try
Describe the bug
Put the following code in the http:/try.dot.net page:
using System;
public class Example
{
    public static void Main()
    {
        var x = Math.Round(11.1, MidpointRounding.AwayFromZero);
    }
}
Instead of printing the output, the "run" button opens the browser's print dialog.
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:

Screenshots
Please complete the following:

OS

 Windows 10
 macOS
 Linux (Please specify distro)
 iOS
 Android


Browser

 Chrome
 Edge
 Safari



Both Edge and Chrome exhibit this behavior on both Windows 10 and MacOS.
/cc @jonsequitur @rchande