Advice for Choosing a .Net library (dll) that can manipulate image

1) The program that use it resides in the Http Server (IIS).
It should do things like:
2) Resize, and save the image file (jpg etc.).
3) Effects such as brightness, etc.
4) AND Transparent Gradient Background on part of the Image for Displaying Text more Clearly.
As done for example in Facebook.
See attached picture.
Thanks, Aryeh.
 Facebook Transparent Gradient Background..
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I had a very positive experience using iTextSharp.dll. It is free and pretty efficient. Check it out

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tuchfeldAuthor Commented:
But isn't it related specifically to pdf?
tuchfeldAuthor Commented:
I was mistaken about section 4.
It is done with css background:
  <title>Transparent Gradient Background on part of the Image for Displaying Text more Clearly</title>
      display: inline-block;
      position: relative;
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      background: url(UgNUNkKQar6.png) bottom left repeat-x;
  <div class="test">
    <img src="11206844_914996608542139_4435948329598264781_o.jpg">

Open in new window

UgNUNkKQar6.png - the background imageWithout the background it look like this:
the Image without the backgroundWith the background it looks like this:
Transparent Gradient Background on part of the Image
nope, it can be used for images as well
tuchfeldAuthor Commented:
Eventually, for the specific case that I presented
the solution is in CSS and not using a graphic library (as I thought mistakenly).
I figured it out myself some time after posting this Question.
Anyway, YZlat comment is useful for further progress.
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