Is there a way to tell if a C# assembly has been compiled with the optimization parameter?

Question

Rather, is there a way to tell if it's been compiled with the optimization parameter enabled or disabled. I don't want to know if it's release or debug, since either can be enabled with or without optimizations. From my perspective, even though the code says it's release version, is it truly optimized? Thanks.

Answer 1

I'm 8 years late but if you, like me, wanted a C# way, here it is:

using System.ComponentModel;
using System.Diagnostics;
using System.Reflection;

internal static class AssemblyExtensions
{
    public static bool IsOptimized(this Assembly asm)
    {
        var att = asm.GetCustomAttribute<DebuggableAttribute>();
        return att == null || att.IsJITOptimizerDisabled == false;
    }
}

As an extension method:

static void Main(string[] args)
{
    Console.WriteLine("Is optmized: " + typeof(Program).Assembly.IsOptimized());
}