WPF Bitmap BitmapImage轉換

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media.Imaging;
 
public class Image_convert
{
 
    public static Bitmap BitmapImage2Bitmap(BitmapImage bitmapImage)
    {
 
        using (MemoryStream outStream = new MemoryStream())
        {
            BitmapEncoder enc = new BmpBitmapEncoder();
            enc.Frames.Add(BitmapFrame.Create(bitmapImage));
            enc.Save(outStream);
            System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(outStream);
 
            return new Bitmap(bitmap);
        }
    }
 
    [System.Runtime.InteropServices.DllImport("gdi32.dll")]
    public static extern bool DeleteObject(IntPtr hObject);
 
    private BitmapImage Bitmap2BitmapImage(Bitmap bitmap)
    {
        IntPtr hBitmap = bitmap.GetHbitmap();
        BitmapImage retval;
 
        try
        {
            retval = (BitmapImage)Imaging.CreateBitmapSourceFromHBitmap(
                         hBitmap,
                         IntPtr.Zero,
                         Int32Rect.Empty,
                         BitmapSizeOptions.FromEmptyOptions());
        }
        finally
        {
            DeleteObject(hBitmap);
        }
 
        return retval;
    }
}