How to create an Icon file that contains Multiple Sizes / Images in C#

Question

How do I create an icon file that contains multiple sizes?

I know that I create a icon from a bitmap using Icon.FromHandle() but how do I add another im

Answer 1

This can be done with IconLib. You can get the source from the CodeProject article or you can get a compiled dll from my GitHub mirror.

public void Convert(string pngPath, string icoPath)
{
    MultiIcon mIcon = new MultiIcon();
    mIcon.Add("Untitled").CreateFrom(pngPath, IconOutputFormat.FromWin95);
    mIcon.SelectedIndex = 0;
    mIcon.Save(icoPath, MultiIconFormat.ICO);
}

CreateFrom can take either the path to a 256x256 png or a System.Drawing.Bitmap object.