ASCII characters below 32 are non-printable and are often represented by escape sequences such as \n for newline and \t for tab. The escape sequence \u001b or \x1b is used to represent the ASCII escape character (27) which is often used in terminal applications to control text formatting.

C# 13 introduces a new \e escape sequence for character literals which is easier to read and less error-prone than the \u001b and \x1b escape sequences.

Code

Now

const string ansiClearScreen = "\e[2J";

string ansiSetForeground(Color color) => $"\e[38;2;{color.Red};{color.Green};{color.Blue}m";

Before

const string ansiClearScreen = "\u001b[2J";

string ansiSetForeground(Color color) => $"\x1b[38;2;{color.Red};{color.Green};{color.Blue}m";

Notes

• The older \x1b escape sequence is error-prone as \x is variable-length and valid hex characters following the 1b change it from ESC to a different unicode character.

More information

• What's new in C# 13.0