Strange static field init in .net core | C# Online Compiler

Strange static field init in .net core by Anonymous

using System;
					
public class Program
{
	private static readonly string BlaBla = $"{666}";
	private static readonly DateTime StartTime = DateTime.UtcNow;
	
	public static void Main()
	{
		Console.WriteLine(BlaBla);
		Console.WriteLine((DateTime.UtcNow-StartTime).ToString());
	}
}

 
using System;
                    
public class Program
{
    private static readonly string BlaBla = $"{666}";
    private static readonly DateTime StartTime = DateTime.UtcNow;
    
    public static void Main()
    {
        Console.WriteLine(BlaBla);
        Console.WriteLine((DateTime.UtcNow-StartTime).ToString());
    }
}

Cached Result
Last Run:	10:30:21 am
Compile:	0.094s
Execute:	0s
Memory:	0b
CPU:	0s

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