Hello:

I do not sure is there any direct method to get icon in Dotnet.
However, in my job, I use Pinvoke to call API to do so.

The follow code is in C#,

class ClsGetIcon
{
    [System.Runtime.InteropServices.DllImport("user32.dll", CharSet =
System.Runtime.InteropServices.CharSet.Auto)]
    extern static bool DestroyIcon(IntPtr handle);

    [System.Runtime.InteropServices.DllImport("shell32.dll", CharSet =
System.Runtime.InteropServices.CharSet.Auto)]
    static extern uint SHGetFileInfo(string pszPath, uint
dwFileAttributes, ref SHFILEINFO sfi, uint cbFileInfo, uint uFlags);
        /*
        DWORD WINAPI SHGetFileInfo(
        LPCTSTR pszPath,
        DWORD dwFileAttributes,
        SHFILEINFO FAR* psfi,
        UINT cbFileInfo,
        UINT uFlags
        );
        */

    //#define SHGFI_ICON              0x000000100     // get icon
    //#define SHGFI_SMALLICON         0x000000001     // get small icon
    const uint SHGFI_ICON = 0x000000100;
    const uint SHGFI_SMALLICON = 0x000000001;

    [StructLayout(LayoutKind.Sequential)]
    struct SHFILEINFO
    {
        public IntPtr hIcon;
        public int iIcon;
        public uint dwAttributes;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
        public string szDisplayName;

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
        public string szTypeName;
    }
    /*
    typedef struct _SHFILEINFO {
    HICON hIcon;
    int iIcon;
    DWORD dwAttributes;
    TCHAR szDisplayName[MAX_PATH];
    TCHAR szTypeName[80];
    } SHFILEINFO;
     */

    static public Icon GetAppIcon(string appPath)
    {
        SHFILEINFO sfi = new SHFILEINFO();
        sfi.hIcon = IntPtr.Zero;
        if (0 != SHGetFileInfo(appPath, 0, ref sfi,
(uint)Marshal.SizeOf(sfi), SHGFI_ICON | SHGFI_SMALLICON) &&
                sfi.hIcon!=IntPtr.Zero)
        {
            Icon newIcon = Icon.FromHandle(sfi.hIcon);

            Icon returnIcon = (Icon)newIcon.Clone();

            DestroyIcon(newIcon.Handle);

            return returnIcon;
        }
        else
            return null;
    }
}