using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[&?]((?:firstName|lastName|phone1|address|zipcode)=|email=(?:.*@.*\.)?)[^&]*";
string input = @"https://example.com/?&iframeLoad=true&firstName=David&lastName=Faber&email=xyzzy?@xyzzy.com&phone1=1234567890&address=myaddress&zipcode=myzip&isAvailableReferral=true&isAvailableDirect=false";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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