code01.cs

using system;
using System.Runtime.CompilerServices;
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine($"Data={Data}");
    }
    public static string Data;
    [ModuleInitializer]
    public static void Init()
    {
        Data="This static method is invoked before any other method in the module";
    }
}