C# Essentials, 2nd Edition

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U

 U1/U2/U4/U8 enum values for UnmanagedType

 UDP (User Datagram Protocol)

 using

 uint integral type , 2nd  , 3rd

 ulong integral type , 2nd  , 3rd

 unary operators, precedence of

 unboxing value types

 unchecked (arithmetic check off) operator , 2nd

 underscore ( _ ) (identifiers)

 undocumented types

Unicode characters

 representing char types

 representing string types

 unified type system

    See : URI Uniform Resource Indicator

 Unix snarf utility

 unmanaged code

 callbacks from

 FCL (Framework Class Library) and

 UnmanagedType enum values

 unsafe code

 unsafe modifier

 unsigned integers

 upcasting classes

 URI (Uniform Resource Indicator)

    See : UDP User Datagram Protocol

 user-defined tags

 ushort integral type , 2nd  , 3rd

 using keyword , 2nd

 using statement