ildasm.exe wont work

Question

Hello!
Can somebody help me maybe, I'm trying to use ildasm.exe just to open a simple program Hello World, written on C# in visual studio 2019.
Every time I'm getting the error "Has no valid CLR header and cannot be disassembled".

Have already googled this problem, but didn't found any solution.

Answer 1

Hi @Maksim Maksim ,
In my test(.NET 5):

namespace ConsoleApp_hello  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Console.WriteLine("Hello World!");  
        }  
    }  
}  

When using 'ildasm.exe', you need to open '....dll' instead of '....exe'.

Hope it could be helpful.

Best Regards,
Xingyu Zhao
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Answer 2

Hey, if ildasm.exe doesn't work try write ".dll" instead ".exe".