Need to run a c# dll from the command line

Question

I have a c# dll defined like this:

namespace SMSNotificationDll
{
    public class smsSender
    {
        public void SendMessage(String number, String message)
        {
            ProcessStartInfo info = new ProcessStartInfo();
            info.FileName = "c:\\Program Files\\Java\\jdk1.6.0_24\\bin\\java";
            info.WorkingDirectory = "c:\\";
            info.Arguments = "-jar SendSms.jar "+number + " "+message;
            info.UseShellExecute = false;
            Process.Start(info);
        }
    }
}

and i need to execute it from the commandline.

Is there any way I can run it through rundll32?

When I run it with this :

rundll32 SMSNotificationDll.dll, SendMessage 0749965244 hello

I get missing entry: SendMessage.

Answer 1

See this question you can't run a .NET dll using rundll32

Answer 2

There is a trick to create unmanaged exports from c# too - https://www.nuget.org/packages/UnmanagedExports

How does it work? Create a new classlibrary or proceed with an existing one. Then add the UnmanagedExports Nuget package. This is pretty much all setup that is required. Now you can write any kind of static method, decorate it with [DllExport] and use it from native code. It works just like DllImport, so you can customize the marshalling of parameters/result with MarshalAsAttribute. During compilation, the task will modify the IL to add the required exports.

class Test
{
  [DllExport("add", CallingConvention = CallingConvention.Cdecl)]
  public static int TestExport(int left, int right)
  {
     return left + right;
  } 
}