Common Csharp dotnet Format specifiers or Format Strings for display

Name Format String Example Comments Currency Format C or c or C2 - precision Console.WriteLine(amount.ToString("C")) output depends on your current UI culture Percent Format ...

Common Csharp dotnet Regex expressions for user input validation

Name Pattern Example US zip code regex ^\d{5}(?:[-\s]\d{4})?$ 12345 or 12345-2345 Canadian zip code regex ^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$ ...