'...
'Create an instance of ImageElement class

Dim imgElem As Neodynamic.WebControls.ImageDraw.ImageElement
imgElem = Neodynamic.WebControls.ImageDraw.ImageElement.FromUrl("~/images/night.jpg")

'Create an instance of RoundCorners class

Dim roundCorners As New Neodynamic.WebControls.ImageDraw.RoundCorners()
roundCorners.Roundness = 20

'Apply the action on the ImageElement

imgElem.Actions.Add(roundCorners)

'Add the ImageElement to the Elements collection of the ImageDraw control

Me.ImageDraw1.Elements.Add(imgElem)
'...

//...
//Create an instance of ImageElement class
Neodynamic.WebControls.ImageDraw.ImageElement imgElem = Neodynamic.WebControls.ImageDraw.ImageElement.FromUrl("~/images/night.jpg");

//Create an instance of RoundCorners class
Neodynamic.WebControls.ImageDraw.RoundCorners roundCorners = new Neodynamic.WebControls.ImageDraw.RoundCorners();
roundCorners.Roundness = 20;

//Apply the action on the ImageElement
imgElem.Actions.Add(roundCorners);

//Add the ImageElement to the Elements collection of the ImageDraw control
this.ImageDraw1.Elements.Add(imgElem);
//...

...
<neoimg:imagedraw id="ImageDraw1" runat="server">
   <Canvas AutoSize="True" />
   <Elements>
      <neoimg:ImageElement Source="File" SourceFile="~/images/night.jpg">
        <Actions>
           <neoimg:RoundCorners Roundness="20" />
        </Actions>
      </neoimg:ImageElement>
   </Elements>
</neoimg:imagedraw>
...