Regasm not working on dll

Question

I am creating a IconHandler shell extension in c# using SharpShell. Here is the code for my dll.

using SharpShell.Attributes;
using SharpShell.SharpIconHandler;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace DllIconHandler
{
    [ComVisible(true)]
    [COMServerAssocation(AssociationType.ClassOfExtension, ".jxe")]
    public class DllIconHandler : SharpIconHandler
    {
        protected override Icon GetIcon(bool smallIcon, uint iconSize)
        {
            Icon icon = null;
            FileInfo file = new FileInfo(SelectedItemPath);
            long size = file.Length;

            if (size > 0)
            {
                icon = new Icon("C:\\Users\\Owner\\Desktop\\icon1.ico");
            }
            else
            {
                icon = new Icon("C:\\Users\\Owner\\Desktop\\icon2.ico");
            }

            return GetIconSpecificSize(icon, new Size((int)iconSize, (int)iconSize));
        }
    }
}

I built this into a dll and moved the dll onto my desktop. Then i ran regasm on the dll using the following commands in the command prompt as an administrator.

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe C:\Users\Owner\Desktop\DllIconHandler.dll /codebase

But when i do this an error appears

RegAsm : error RA0000 : An error occurred inside the user defined Register/Unreg
ister functions: System.InvalidOperationException: Cannot open default icon key
for class jxe_auto_file
   at SharpShell.ServerRegistration.ServerRegistrationManager.SetIconHandlerDefa
ultIcon(RegistryKey classesKey, String className)
   at SharpShell.ServerRegistration.ServerRegistrationManager.RegisterServerAsso
ciations(Guid serverClsid, ServerType serverType, String serverName, Association
Type associationType, IEnumerable`1 associations, RegistrationType registrationT
ype)
   at SharpShell.SharpShellServer.DoRegister(Type type, RegistrationType registr
ationType)

It appears that something is wrong in the registry.

Answer 1

The entry in your registry should looks like this:

HKEY_CLASSES_ROOT
jxe_auto_file
DefaultIcon: (Default) (Path to icon)

I'm pretty sure there was no "DefaultIcon" in your jxe_auto_file entry