[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] UDP ( User Datagram Protocol) 2nd UdpClient class, System.Net.Sockets namespace 2nd uint keyword UInt16 struct, System namespace UInt32 struct, System namespace UInt64 struct, System namespace UIntPtr struct, System namespace ulong keyword UnauthorizedAccessException class, System namespace unchecked keyword underscore -separation naming convention style undocumented types, FCL and UnhandledExceptionEventArgs class, System namespace UnhandledExceptionEventHandler class, System namespace Unicode char types UnicodeCategory classes, System.Globalization UnicodeEncoding class, System.Text unions, structs UnknownWrapper sealed class, System.Runtime.InteropServices unmanaged code FCL and pointers to UnmanagedMarshal sealed class, System.Reflection.Emit UnmanagedType enumeration, System.Runtime.InteropServices unsafe code, pointers unsafe keyword 2nd URI (Uniform Resource Indicator) Uri class, System namespace UriBuilder class, System namespace UriException class, System namespace UriHostNameType enumeration, System namespace UriPartial enumeration, System namespace user-defined conversions user-defined tags, XML UserPreferenceCategory enumeration, Microsoft.Win32 UserPreferenceChangedEventArgs class, Microsoft.Win32 UserPreferenceChangedEventHandler delegate, Microsoft.Win32 UserPreferenceChangingEventArgs class, Microsoft.Win32 UserPreferenceChangingEventHandler delegate, Microsoft.Win32 ushort keyword using directive using keyword 2nd using statement UTF7Encoding class, System.Text |