Resize Image Or Resource

How do I Resize Image or Resource In my Code

 <div>Resized Image: <asp:hyperlink id="hlResizedImage" runat="server" /></div>
 <div>Resized Resource: <asp:hyperlink id="hlResizedResource" runat="server" /></div>

hlResizedImage.ImageUrl = "/Integrations/Centralpoint/Resources/CollapseUp72.png/50/0/false/Image.ashx"; //ImagePath/Width/Height/Enlarge/Image.ashx
hlResizedImage.NavigateUrl = "/Integrations/Centralpoint/Resources/CollapseUp72.png";
hlResizedResource.ImageUrl = "/Resource.ashx?sn=SampleThumb&width=50&height=0&enlarge=false"; // id or sn, width, height, enlarge
hlResizedResource.NavigateUrl = "/Resource.ashx?sn=SampleThumb";