不要usingsystem.windows.media

在提升你需要該引用的地方System.Drawing.Image

或者將滑鼠移動到提示有問題的地方捕獲一下那個小方格，然後選擇System.Drawing.Image這樣就行了

privatevoidbutton1_Click(objectsender,EventArgse)

{

Bitmapbox2=newBitmap(pictureBox1.Image);

floatx=(float)Double.Parse(textBox1.Text);

box2=RotateBitmap(box2,x,this.pictureBox2.BackColor);

System.Drawing.Imageimage=System.Drawing.Image.FromHbitmap(box2.GetHbitmap());

pictureBox2.Image=image;

}

publicBitmapRotateBitmap(Bitmapbmp,floatangle,ColorbkColor)

{

intw=bmp.Width+2;

inth=bmp.Height+2;

PixelFormatpf;

if(bkColor==Color.Transparent)

{

pf=PixelFormat.Format32bppArgb;

}

else

{

pf=bmp.PixelFormat;

}

Bitmaptmp=newBitmap(w,h,pf);

Graphicsg=Graphics.FromImage(tmp);

g.Clear(bkColor);

g.DrawImageUnscaled(bmp,1,1);

g.Dispose();

GraphicsPathpath=newGraphicsPath();

path.AddRectangle(newRectangleF(0f,0f,w,h));

Matrixmtrx=newMatrix();

mtrx.Rotate(angle);

RectangleFrct=path.GetBounds(mtrx);

Bitmapdst=newBitmap((int)rct.Width,(int)rct.Height,pf);

g=Graphics.FromImage(dst);

g.Clear(bkColor);

g.TranslateTransform(-rct.X,-rct.Y);

g.RotateTransform(angle);

g.InterpolationMode=InterpolationMode.HighQualityBicubic;

g.DrawImageUnscaled(tmp,0,0);

g.Dispose();

tmp.Dispose();

returndst;

}