·System.Drawing
GDI+ support
System.Drawing.Drawing2D
special effects
System.Drawing.Imaging
support for .jpg, .gif files
System.Drawing.Printing
settings like margins, resolution
·System.Net
support for HTTP, DNS, basic sockets
System.Net.sockets
sockets details
·System.Reflection
view
applications meta data including RTTI
·System.Runtime.InteropServices
Access COM
objects and Win32 API
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