JetBrains Rider - how to execute a C# scratch

In JetBrains Rider, when I create a scratch C# file, how can I execute it? Making the Main method public static and adding a namespace seems to be not enough.

using System;

namespace MyNamespace
{
    public class Foo
    {
        public static void Main()
        {
            Console.WriteLine("hello");
        }
    }
}

Rider version: JetBrains Rider 2022.3.1

Windows 10

Adding a namespace is actually not even required. What worked for me is the following:

• creating a scratch file with the following content (as you already did):

using System;

class Foo
{
    public void Main()
    {
        Console.WriteLine("hello");
    }
}

• then selecting the code you want to run/execute (ctrl+A for the entire script)
• hit alt+enter to bring up a tooltip menu and select "Send Selection to C# Interactive"
• this will open a C# interactive tab where you can input C# code such as var x = new Foo(); (and it doesn't matter if Rider does not recognise Foo() as a valid constructor),
• lastly calling x.Main() will then run your function

You can also find a good description on this page: https://blog.jetbrains.com/dotnet/2017/12/01/c-interactive-rider/

I hope this helped!