The behavior create an image to display the chart and this will be the temp folder where create the image. In this folder you must have the write permission for the Internet User Account and for the Asp.Net account. After the image is create and display in the page the extension delete the image immediately so you will never have old image to delete yourselfe.
The image create can have different format like: BMP JPG GIF PNG like you prefer.
The width of the image
The height of the image
If checked the chart will be rendered horizontally
The padding in pixel of the image
The padding in pixel of the chart title
The title text
This are the standard value to format the text