Extract icon from DLL with transparency

Question

I have the following C# code to extract an icon with a specific index from a specific DLL:

using System;
using System.Drawing;
using System.Runtime.InteropServices;

public class ExtractIcon
{
    public static Icon Extract(string file, int number, bool largeIcon)
    {
        IntPtr large;
        IntPtr small;
        ExtractIconEx(file, number, out large, out small, 1);
        try
        {
            return Icon.FromHandle(largeIcon ? large : small);
        }
        catch
        {
            return null;
        }

    }
    [DllImport("Shell32.dll", EntryPoint = "ExtractIconExW", CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    private static extern int ExtractIconEx(string sFile, int iIndex, out IntPtr piLargeVersion, out IntPtr piSmallVersion, int amountIcons);
}

This works fine. Sort of. Because it doesn't handle transparency.

Take a look:

How can I fix this?

---

EDIT

Credits to @rbmm

The problem was not the code above but rather the code I was using to convert from Icon to Bitmap. I was using Bitmap.FromHIcon, which apparently discards the transparency. I now use a custom method to convert between these two and it works flawlessly.