C# 7 and .NET: Designing Modern Cross-platform Applications

Examples of regular expressions

Here are some example regular expressions:

Expression	Meaning
\d	A single digit somewhere in the input
a	The a character somewhere in the input
Bob	The word Bob somewhere in the input
^Bob	The word Bob at the start of the input
Bob$	The word Bob at the end of the input
^\d{2}$	Exactly two digits
^[0-9]{2}$	Exactly two digits
^[A-Z]{4,}$	At least four uppercase letters only
^[A-Za-z]{4,}$	At least four upper or lowercase letters only
^[A-Z]{2}\d{3}$	Two uppercase letters and three digits only
^d.g$	The letter d, then any character, and then the letter g, so it would match both dig and dog or any single character between the d and g