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Beginning ASP.NET 3.5 in C# 2008: From Novice to Professional, Second Edition by Matthew MacDonald

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12.2. Dynamic Graphics

One of the features of the .NET Framework is GDI+, a set of classes designed for drawing images. You can use GDI+ in a Windows or an ASP.NET application to create dynamic graphics. In a Windows application, the graphics you draw would be copied to a window for display. In ASP.NET, the graphics can be rendered right into the HTML stream and sent directly to the client browser.

In general, using GDI+ code to draw a graphic is slower than using a ready-made image file. However, GDI+ gives you much more freedom. For example, you can tailor your image to suit a particular purpose, incorporating information such as the date or current user name. You can also mingle text, shapes, and other bitmaps to create a complete picture. ...

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