Tutorial by Examples

public bool Check() { string input = "Hello World!"; string pattern = @"H.ll. W.rld!"; // true return Regex.IsMatch(input, pattern); }

public bool Check() { string input = "Hello World!"; string pattern = @"H.ll. W.rld!"; // true return Regex.IsMatch(input, pattern, RegexOptions.IgnoreCase | RegexOptions.Singleline); }

public string Check() { string input = "Hello World!"; string pattern = @"W.rld"; // Hello Stack Overflow! return Regex.Replace(input, pattern, "Stack Overflow"); }

public string Check() { string input = "Hello World!"; string pattern = @"H.ll. (?<Subject>W.rld)!"; Match match = Regex.Match(input, pattern); // World return match.Groups["Subject"].Value; }

public string Remove() { string input = "Hello./!"; return Regex.Replace(input, "[^a-zA-Z0-9]", ""); }

Using using System.Text.RegularExpressions; Code static void Main(string[] args) { string input = "Carrot Banana Apple Cherry Clementine Grape"; // Find words that start with uppercase 'C' string pattern = @"\bC\w*\b"; MatchCollection matches = Regex.M...