Regex Tester for C#
Free online regex tester with C# code examples
Working with regex tester in C#? Our free online regex tester helps C# developers format, validate, and process data instantly. Below you will find C# code examples using System.Text.RegularExpressions (built-in) so you can achieve the same result programmatically in your own projects.
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Open Regex TesterC# Code Example
using System.Text.RegularExpressions;
string text = "Contact support@example.com";
var matches = Regex.Matches(text, @"[\w.+-]+@[\w-]+\.[\w.]+");
foreach (Match match in matches)
Console.WriteLine(match.Value);Quick Setup
Library: System.Text.RegularExpressions (built-in)
// Built-in namespace — no package neededC# Tips & Best Practices
- Use @ verbatim strings to avoid double-escaping
- Regex.IsMatch() for simple validation checks
- Use RegexOptions.Compiled for frequently used patterns