using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(<a\b[^<>]*href=['""]?http[^<>]+)>";
string substitution = @"$1 target=""_blank"" alt=""Regex examples sheet"" title=""Regex examples sheet"">";
string input = @"<a href=""https://www.codebales.com/regex-expressions-a-working-sheet"" target=""_blank"">Regex examples sheet</a>";
RegexOptions options = RegexOptions.IgnoreCase;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx