不知道用c#怎么写，请教高手啊

void CDDALineView::OnDraw(CDC* pDC)
{
    CDDALineDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    // TODO: add draw code for native data here
    int x,x0(200),y0(200),x1(500),y1(500);
    float dx,dy,y,k;
    dx=x1-x0;
    dy=y1-y0;
    k=dy/dx;
    y=y0;
    for(x=x0;x<=x1;x++)
    {
        pDC->SetPixel(x,(int)(y+0.5),RGB(255,0,0));
        y+=k;
    }
}
把这个C的修改下就OK了吧~