Unicode character escape sequences
A Unicode character escape sequence represents a Unicode character. Unicode character escape sequences are processed in identifiers (§2.4.2), character literals (§2.4.4.4), and regular string literals (§2.4.4.5). A Unicode character escape is not processed in any other location (for example, to form an operator, punctuator, or keyword). unicode-escape-sequence: A Unicode escape sequence represents the single Unicode character formed by the hexadecimal number following the “\u” or “\U” characters. Since C# uses a 16-bit encoding of Unicode code points in characters and string values, a Unicode character in the range U+10000 to U+10FFFF is not permitted in a character literal and is represented using a Unicode surrogate pair in a string literal. Unicode characters with code points above 0x10FFFF are not supported. Multiple translations are not performed. For instance, the string literal “\u005Cu005C” is equivalent to “\u005C” rather than “\”. The Unicode value \u005C is the character “\”. The example class Class1 shows several uses of \u0066, which is the escape sequence for the letter “f”. The program is equivalent to class Class1
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